Image: Shuttle on pad
Stan Honda  /  AFP - Getty Images
A large cloud forms behind Atlantis on Launch Pad 39A at NASA's Kennedy Space Center in Florida on Tuesday as preparations are made for Friday's scheduled launch of the shuttle program's final flight.
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updated 7/6/2011 4:41:14 PM ET 2011-07-06T20:41:14

The weather isn't cutting NASA any breaks, not even for the last space shuttle launch set for Friday.

Bad weather is expected, and forecasters said there's a 70 percent chance that rain or thunderstorms will prevent Atlantis from flying. No hail or other severe conditions are anticipated, just "a lot of nuisance weather," said the shuttle weather officer, Kathy Winters. The weather improves slightly over the weekend.

Friday's forecast would have to get worse before he'd call off the launch, mission management team leader Mike Moses said at a Wednesday news conference. A rain-free, storm-free zone is needed 23 miles around, among other things, in order for Atlantis to take off.

Launch director Mike Leinbach doesn't just want a hole in the clouds for Atlantis to sneak through, he wants no clouds for this historic send-off — the last of the 30-year shuttle program.

Between 750,000 and 1 million people are expected to jam the area for the launch, rivaling the crowds that gathered for the Apollo moon shots.

"I hope it's not like the last launch where we only saw it for 22 seconds," Leinbach said, referring to Endeavour's May liftoff when the shuttle quickly disappeared into the clouds.

Glancing at Winters seated next to him, Leinbach said, "I'm hoping she's really blown this forecast big time."

The weather was the only uncertainty hanging over the 135th and final shuttle launch. At the mission management meeting Wednesday, there were only a few technical items to discuss, all minor. The formal "go" for launch came easily.

In the hallways of Kennedy Space Center, the mood is increasingly somber, Leinbach said. Thousands of shuttle workers will lose their jobs soon after Atlantis and its four astronauts return from the 12-day space station delivery mission.

Even so, Moses and Leinbach stressed, there is no desire for delays that would push off those layoffs.

"Friday's game day for us, so we don't want to wait until Saturday" or beyond, Leinbach said.

If Atlantis isn't flying by Sunday, NASA said it will have to wait until at least July 16. That's because of a scheduling conflict with an unmanned rocket due to lift off next week.

"We know there's a lot more interest in the final launch, but when we're on console Friday morning, it's going to be like any other launch," Leinbach said.

He did confide that he slipped out to Atlantis' launch pad over the weekend and spent a few hours by himself, soaking it all in one last time.

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Like so many others, Leinbach was inspired by the space shuttles. He applied to NASA in 1984, three years after Columbia made the first shuttle flight. Also like so many others at Kennedy, he's disturbed that the future of human spaceflight is still so murky.

NASA was supposed to aim for the moon after shuttle, but President Barack Obama scrapped his predecessor's plan in favor of expeditions to asteroids and Mars. That's still years away, though. So are the astronaut ferry flights to the International Space Station planned by commercial companies.

While things are going to be "significantly different" around the launch site in the months ahead, it won't be the same either for the millions of people who grew up with the space shuttles, Leinbach said.

"Anyone under the age of 30 has always had the shuttle program as a part of Americana, and we won't have that anymore," he said.

If Atlantis gets off Friday, landing is planned for July 20 at Kennedy Space Center. The early shuttle flights landed at Edwards Air Force Base in California, which is still the backup touchdown site.

Atlantis will go on display at the Kennedy visitor complex. Discovery and Endeavour will head across the country to museums.

"I think I speak for everyone at KSC," Leinbach said Wednesday in a parting shot, "that it will really stink if we landed out west this time."

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Interactive: Final shuttle mission in focus

Photos: The final countdown: Shuttle Atlantis

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  1. Atlantis rising

    The space shuttle Atlantis makes its maiden voyage on Oct. 3, 1985, for the Defense Department's STS-51-J mission. At 176,413 pounds, Atlantis is nearly 3.5 tons lighter than Columbia, which was the heaviest shuttle. Atlantis is the lightest shuttle of the remaining fleet, weighing 3 pounds less than the shuttle Endeavour (with the three main engines). Atlantis is also the last space shuttle to be retired.

    Other statistics:
    Length: 122.17 feet
    Height: 56.58 feet
    Wingspan: 78.06 feet (Phil Sandlin / AP) Back to slideshow navigation
  2. First of its kind

    NASA's Magellan spacecraft is deployed from Atlantis' cargo bay in 1989 during the STS-30 mission. The Venus orbiter was the first interplanetary probe launched from a space shuttle. Later that year, Atlantis launched the Galileo probe to Jupiter. (NASA) Back to slideshow navigation
  3. Mission to Mir

    NASA and the Russian space agency kicked off a new era in international space cooperation during the STS-71 mission in June 1995, when Atlantis docked with Russia's Mir space station for the first time. This historic photo of the linked spacecraft was taken from a Russian Soyuz capsule during a fly-around. (NASA) Back to slideshow navigation
  4. Here's looking at you

    The space shuttle Atlantis begins the slow journey to Launch Pad 39A from the Vehicle Assembly Building at NASA's Kennedy Space Center in preparation for the launch of STS-79 in September 1996. This dramatic view, looking directly down onto the shuttle stack, was taken from the roof of the 525-foot-tall VAB. (NASA) Back to slideshow navigation
  5. Science in orbit

    Astronaut Shannon Lucid floats through the tunnel that connects Spacelab to Atlantis' cabin on Sept. 24, 1996. The Spacelab module rode in the shuttle's cargo bay and provided more space for scientific experiments. During this STS-79 mission, Atlantis linked up with Russia's Mir space station and brought Lucid back to Earth. (NASA) Back to slideshow navigation
  6. Lighting up the night

    Atlantis streaks into the early morning sky from NASA's Kennedy Space Center on May 15, 1997, as seen in this long-exposure photo taken from Veterans Memorial Park in Titusville, Fla. Atlantis' 10-day STS-84 mission featured a docking with Russia's Mir space station and a crew transfer. Atlantis docked with Mir seven times before the space station was deorbited in 2001. (Brian Cleary / AFP - Getty Images) Back to slideshow navigation
  7. Good as new

    The space shuttle Atlantis went back to its assembly plant in Palmdale, Calif., for 10 months of refurbishment and upgrades in 1997-1998. This aerial photo shows Atlantis taking a piggyback ride back to Kennedy Space Center in Florida atop a modified Boeing 747 jet on Sept. 1, 1998. (NASA) Back to slideshow navigation
  8. Checking it out

    Atlantis' upgraded cockpit gets a once-over in 1999 from engineers and executives, including Roy Bridges, Kennedy Space Center's director (seated at bottom left), as well as Laural Patrick, Joann Morgan and George Selina. The upgrades made Atlantis the most modern orbiter in the shuttle fleet, with a control system as advanced as those found on commercial jet airliners and military aircraft. (NASA) Back to slideshow navigation
  9. Tile tune-up

    Izeal Battle, a worker from United Space Alliance, repairs heat-shield tiles on the belly of the space shuttle Atlantis in the Orbiter Processing Facility at Kennedy Space Center on Jan. 30, 2004. (Matt Stroshane / Getty Images) Back to slideshow navigation
  10. Back in business

    Atlantis' astronauts leave their quarters at Kennedy Space Center and board the "Astrovan" for the ride out to Launch Pad 39B on Sept. 8, 2006, while gun-toting guards keep watch. A faulty fuel gauge grounded the shuttle for an extra day, but on Sept. 9 the shuttle lifted off on its STS-115 mission to the International Space Station. It marked Atlantis' first launch since 2002. (Jeff Haynes / AFP - Getty Images) Back to slideshow navigation
  11. Liftoff!

    The space shuttle Atlantis rises on a pillar of cloud from Launch Pad 39B at Kennedy Space Center on Sept. 9, 2006. Atlantis delivered structural components to the International Space Station during its STS-115 mission, resuming an orbital construction project that was stopped following the 2003 Columbia tragedy. (Matt Stroshane / Getty Images) Back to slideshow navigation
  12. Mission accomplished

    The clouds of Earth provide a backdrop for Atlantis shortly after its departure from the International Space Station on Sept. 17, 2006. (NASA) Back to slideshow navigation
  13. Night landing

    Atlantis lands amid darkness at Kennedy Space Center in Florida on Sept. 21, 2006, bringing the STS-115 space station construction mission to a successful close. (Chris O'Meara / AFP - Getty Images) Back to slideshow navigation
  14. Kicking the tires

    Atlantis crew members Chris Ferguson and Dan Burbank look over their spaceship after landing at Kennedy Space Center on Sept. 21, 2006. Ferguson was slated to be Atlantis' commander for NASA's final space shuttle mission. (Pierre Ducharme / AFP - Getty Images) Back to slideshow navigation
  15. Blaze of glory

    The space shuttle Atlantis' solid rocket boosters light up for launch on June 8, 2007, beginning a flight to the International Space Station. This STS-117 mission marked the 250th orbital human spaceflight. (Mark Wilson / Getty Images) Back to slideshow navigation
  16. Watching the ascent

    NASA mission managers monitor Atlantis' liftoff from Firing Room 4 at Kennedy Space Center in Florida on Nov. 16, 2009. During the STS-129 mission, Atlantis delivered a payload platform and vital supplies to the International Space Station. (Bill Ingalls / NASA) Back to slideshow navigation
  17. Shuttle skywriting

    Nearly an hour after launch, contrails from the shuttle Atlantis' liftoff float above the Vehicle Assembly Building at Kennedy Space Center in Florida on June 8, 2007. (Tim Sloan / AFP - Getty Images) Back to slideshow navigation
  18. Last visit to Hubble

    Spacewalkers Andrew Feustel and John Grunsfeld work on the Hubble Space Telescope on May 16, 2009, during Atlantis' STS-125 mission. This marked the final Hubble servicing mission. (NASA) Back to slideshow navigation
  19. Making a list

    Atlantis astronaut Mike Massimino writes notes on a checklist during the STS-125 Hubble servicing mission on May 18, 2009. During this mission, Massimino became the first astronaut to send a Twitter update from orbit: "Launch was awesome!!" (NASA) Back to slideshow navigation
  20. First Family meets Atlantis

    NASA astronaut Janet Kavandi leads President Barack Obama, First Lady Michelle Obama and their daughters Sasha and Malia beneath the shuttle Atlantis during a tour of the Orbiter Processing Facility at Kennedy Space Center on April 29, 2011. At the time, Atlantis was being prepared for its final flight. (Saul Loeb / AFP - Getty Images) Back to slideshow navigation
  21. Final flight

    Space shuttle Atlantis lifts off from Launch Pad 39A at NASA's Kennedy Space Center in Florida on July 8, 2011. The shuttle fleet's 135th and final mission, known as STS-135, brought supplies to the international space station. (John Raoux / AP) Back to slideshow navigation
  22. Witnessing history

    Spectators watch the liftoff of Atlantis on its final mission at NASA's Kennedy Space Center in Florida on July 8, 2011. (Shawn Thew / EPA) Back to slideshow navigation
  23. Last rendezvous

    The space shuttle Atlantis docks with the International Space Station for the last time on July 10, 2011. The shuttle delivered more than four tons of food, clothes and other supplies to keep the space station going in the post-shuttle era. NASA figures that this shipment will help keep the space station provisioned at least through the end of 2012. (NASA TV) Back to slideshow navigation
  24. Flight into history

    This poster pays tribute to the shuttle Atlantis' quarter-century of spaceflight: Graphic elements include the International Space Station and Russia's Mir space station, the Hubble Space Telescope (which Atlantis visited during the last servicing mission) and Venus and Jupiter (which were the destinations for probes launched from Atlantis). Threaded through the design are the mission patches for each of Atlantis' flights. A copy of this tribute poster hangs in Firing Room 4 of the Launch Control Center at NASA's Kennedy Space Center in Florida. (Amy Lombardo / NASA) Back to slideshow navigation
  25. An unprecedented view of the space shuttle Atlantis, appearing like a bean sprout against clouds and city lights, on its way home, as photographed by the Expedition 28 crew of the International Space Station on July 21, 2011. Airglow over Earth can be seen in the background. The Atlantis returned to Earth marking the end of the space shuttle era when its wheels touched down for the last time at the Kennedy Space Centre. 'After serving the world for over 30 years, the space shuttle has earned its place in history. It's come to a final stop,' Atlantis commander Chris Ferguson replied. (Nasa / Handout / EPA) Back to slideshow navigation
  26. Johnson Space Center employees Shelley Stortz, left, and Jeremy Rea, right, hold hands as they watch space shuttle Atlantis land on July 21, 2011, in Houston. (David J. Phillip / AP) Back to slideshow navigation
  27. Space shuttle Atlantis lands at the Kennedy Space Center in Cape Canaveral, Florida, on July 21, 2011. The Atlantis glided home through a moonlit sky for its final landing at the Kennedy Space Center in Florida, completing a 30-year odyssey for NASA's shuttle fleet. (Pierre Ducharme / Reuters) Back to slideshow navigation
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  1. Phil Sandlin / AP
    Above: Slideshow (27) Final countdown for Atlantis
  2. Adam Zyglis / Buffalo News, PoliticalCartoons.com
    Slideshow (13) Shuttle era draws to a close
  3. Image:
    Y. Beletsky / ESO
    Slideshow (12) Month in Space: January 2014

Video: Former astronaut on 'amazing' shuttles

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