WASHINGTON — An unmanned Army surveillance blimp broke free of its mooring at a Maryland proving ground Wednesday and drifted more than 120 miles north into Pennsylvania, dragging a long tether that knocked out power to thousands, officials said.
The 243-foot-long, helium-filled aerostat broke free from Aberdeen Proving Ground at around 12:20 p.m., and a pair of F-16 fighter jets were scrambled to track it as it drifted north, before the blimp came down more than 3 hours later, North American Aerospace Defense Command said.
Sylvia Hock and her 9-year-old son, Aidan, were getting out of their car at their Millville home when they spotted the blimp overhead.
"We thought it was going to land," Hock told NBC News. "We thought it was going to pop, it got so low. We called 911, who said they were tracking it."
She said the blimp was dragging a cable, and "as it went it tore into lines and ripped poles out of ground."
The Joint Land Attack Cruise Missile Defense Elevated Netted Sensor System (JLENS) surveillance aerostat landed at around 4 p.m. in a wooded area near Moreland Township, Pennsylvania, NORAD said.
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There were no injuries reported. NORAD said a military recovery team was on the way to the area. Moreland Township is about 20 miles east of Williamsport, and about 120 miles northwest of the proving ground. At one point the blimp climbed to 16,000 feet, NORAD said.
The blimp had a tether of approximately 6,700 feet — more than a mile — attached when it broke free, Aberdeen Proving Ground said.
The dragging cable knocked out power to around 30,000 people in Pennsylvania, Gov. Tom Wolf's office said in a statement. By Wednesday night power was restored to most customers, with 311 without electricity as of 11 p.m., power company PPL Electric said.
If the #blimp has damaged your property, submit a claim with the Army Claims Services at 301-677-9076.
Ground controllers at Aberdeen Proving Ground do have the ability to deflate the helium-filled blimp but did not so so, NORAD said. It is unclear if an auto-deflate system activated and caused the blimp to descend, officials said.
Jason Jarinko, at teacher at Central Columbia High School in Bloomsburg, told The Associated Press that a student gazing out the window alerted him to the wayward blimp.
Jarinko estimates the blimp passed about 200 to 300 feet above the tree line, dragging a long tether that pulled down power lines and caused the school's lights to flicker and eventually fail.
NORAD said it worked closely with the Federal Aviation Administration to keep commercial airlines informed of the blimp's location to avoid any close calls.
NORAD said it was still trying to determine how the blimp got loose. Officials said the tether was within weather design minimums when the blimp became detached.
The JLENS system uses two aerostats, or tethered blimps that carry radar equipment — one is used for fire control radar and one for wide-area surveillance radar, NORAD said. The blimps are supposed to fly at up to 10,000 feet.
Jim Miklaszewski is the chief Pentagon correspondent for NBC News. On 9/11, he was the first at the scene to report that the Pentagon had been attacked and has since led the network's coverage of the war in Afghanistan.
Since joining NBC in 1985, Miklaszewski was a White House correspondent during the Clinton and Bush administrations, covering President Clinton's transition from Little Rock, his many trips abroad including Moscow and the Middle East and his reelection. He was also an NBC floor reporter at the Democratic and Republican conventions in 1996 and 2000.
In the Bush White House, Miklaszewski reported on the Gulf War with Iraq, summits with Mikhail Gorbachev and Boris Yeltsin and the Bush reelection campaign in 1992.
Miklaszewski has logged considerable foreign experience with battlefront coverage of wars in Lebanon, El Salvador and the Falkland Islands. He also covered the United States air raid on Libya, and the "tanker wars" in the Persian Gulf.
Courtney Kube is a correspondent covering national security and the military for the NBC News Investigative Unit.
Andrew Rudansky, Phil Helsel and Associated Press contributed.