Nuclear powers decreasing but modernizing their arsenals
Russia and the United States continue to account for 90% of nuclear weapons
An unarmed AGM-86B Air-Launched Cruise Missile is released from a B-52H Stratofortress over the Utah Test and Training Range during a Nuclear Weapons System Evaluation Program sortie, 80miles west of Salt Lake City, Utah, U.S., September 22, 2014. Picture taken September 22, 2014.(photo credit: REUTERS)ByANNA AHRONHEIM
