SALISBURY, ENGLAND - MARCH 19: A tanks fires during Exercise Tractable on March 19, 2015 in Salisbury, England. The three-week major exercise involving hundreds of vehicles including Challenger 2, Warrior and FV 432Õs belonging to 1 Yorks and Kings Royal Hussars and more than 1,500 troops is designed to test the Lead Armoured Task ForceÕs ability to deploy at short notice. (Photo by Matt Cardy/Getty Images)
