A B52-H Stratofortress lands at Barksdale Air Force Base, Louisiana, after a 15.5-hour nonstop sortie from the United States to the U.S. Southern Command area of responsibility Aug. 12, 2014. The long-range intelligence, surveillance and reconnaissance mission was part of a scenario to defend the Panama canal from myriad threats during PANAMAX 2014, a multinational U.S. Southern Command-sponsored exercise. (U.S. Air Force photo/Senior Airman Benjamin Gonsier)