David WelnaDavid Welna is NPR's national security correspondent.
U.S. soldiers carry a 155 mm artillery round for a live-fire training exercise during the Anakonda war games near Olezno, Poland, on June 14.
Sgt. Ashley Marble/55th Combat Camera via DVIDS
Former Florida Sen. Bob Graham, shown here in 2012, has urged the Obama administration to release the 28 pages of a congressional inquiry into the Sept. 11 attacks that have remained classified. Graham and others say this material contains important information about the financing of the terrorists and their Saudi connections.
Crew members of the U.S. Navy destroyer USS Jason Dunham load supplies while docked in Guantanamo Bay, Cuba, in 2015. The U.S. and Cuba have restored diplomatic relations, but the U.S. says it remains committed to keeping the base.