Know it All: Monday evening’s top stories at NBC News

U.S. Secretary of State John Kerry delivers a statement about the use of chemical weapons in Syria at the Department of State August 26, 2013 in Washington, DC. Kerry said that chemical weapons had been used to kill scores of people during the ongoing civil war in Syria. Chip Somodevilla, Getty Images

Here's a snapshot of some of the top stories we're following Monday evening

US: Syria used chemical weapons — and we’ll show you proof

Secretary of State John Kerry on Monday accused Syria of using chemical weapons against its people, and U.S. officials told NBC News that they would release intelligence evidence to prepare the public for a possible military response. President Barack Obama hasn't made any decision on whether wage strikes against the regime of Syrian President Bashar Assad, White House press secretary Jay Carney told reporters Monday. But other U.S. officials told NBC News that the administration could begin laying the groundwork by disclosing the evidence as early as Tuesday. Read it at NBC News.

Dispatch from Syrian refugee camps in Jordan

NBC News’ Ann Curry spoke with a family living in a Jordan refugee camp after they fled war-torn Syria. “They destroyed our home,” said 7-year-old Jalal. He and his brother, Gassem, 10, are two of the 1 million children who live in makeshift shelters in the camps. “I am glad that I got my children out,” said the boys’ mother, who has heard from her husband only once since arriving in Jordan. Read it at NBC News.

Hero honored

U.S. Army Staff Sgt. Ty Michael Carter on Monday became the fifth living recipient of the Medal of Honor to be rewarded for actions in Iraq or Afghanistan. Carter resupplied ammunition to fighting positions throughout a six-hour battle in Afghanistan in 2009, providing first aid to his troops, killing enemy fighters, and risking his life to save a fellow soldier who was injured and pinned down by overwhelming enemy fire. President Barack Obama bestowed the honor at an afternoon ceremony at the White House. Read it at NBC News.

4 Rim fire rages on

The Rim Fire is 15 percent contained, which is a jump from 7 percent reported on Sunday night. Near Yosemite National Park, the wildfire stretches 234 square miles and still threatens some 4,500 structures as well as the power and water utilities in San Francisco. Read it at NBC News.

Attorney General Holder pressed for an explanation

Eight Democratic senators and congressmen have asked Attorney General Eric Holder to answer questions raised by a report claiming the NSA supplies the Drug Enforcement Agency with intelligence information in order to bring non-terrorism cases against Americans. According to the report, the DEA passes information from the NSA to other government agencies, but most tips deal with organized crime, drugs and money laundering, not terrorism.

Couple married for 65 years dies 11 hours apart

In a poignant end to a romantic life story, Harold and Ruth Knapke died in their shared room in a nursing home in Ohio on Aug. 11, days before their 66th anniversary. One of the Knapke’s daughters told the Dayton Daily News that their parents “weren't going to go anywhere without the other one." Read it at TODAY

Fort Hood shooter

On Monday, a dozen witnesses testified in the sentencing phase in the trial of Maj. Nidal Hasan, the Army psychiatrist convicted of carrying out the deadly 2009 attack at Fort Hood. Additional witness testimony will resume on Tuesday. Hasan is representing himself but did not cross-examine any of the witnesses, including a paralyzed sergeant and family members of victims, on Monday. Hasan could be sentenced to death by the military jury of 13 who convicted him of 45 charges of premeditated murder and attempted premeditated murder. His standby attorneys believe Hasan wants to be put to death, although he has refuted that claim.

The Associated Press and Reuters contributed to this report.