WASHINGTON, DC - MAY 06: U.S. Chairman of the Joint Chiefs of Staff Gen. Martin Dempsey testifes before the Senate Appropriations Committee on Capitol Hill May 6, 2015 in Washington, DC. The committee heard testimony on the fiscal year 2016 budget for the Department of Defense. (Photo by Win McNamee/Getty Images)
Missiles are displayed during an exhibition on the 1980-88 Iran-Iraq war, as part of the "Sacred Defense Week" commemorating the 8-year war on September 28, 2014 at a park, northern Tehran. The war between Iran and Iraq was the longest conventional war of 20th century and was officially started on September 22, 1980, when Iraqi armed forces invaded western Iran and ended on August 20, 1988, when Iran accepted the United Nation's ceasefire resolution 598. AFP PHOTO/ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images)
