CARNOUSTIE, SCOTLAND - APRIL 12:  Royal Marines from 42 Commando take part in an exercise at Barry Buddon simulating an attack on shores of a hostile country on April 12, 2013 in Carnoustie, Scotland. The exercise is part of Joint Warrior which will run from the 15 to 29 April in locations across the UK, involving UK forces and international allies in all aspects of warfare.  (Photo by Jeff J Mitchell/Getty Images)