A dust storm carring small amounts of rain, sparks lightning across the sky over Camp Leatherneck and Camp Bastion, Helmand province, Afghanistan, May 3, 2014. U.S. Marines in the meteorology and oceanography (METOC) occupation, sent out numerous weather advisories as a warning system to coalition forces residing aboard the camp. (Official U.S. Marine Corps photo by Lance Cpl. Darien J. Bjorndal, Marine Expeditionary Brigade Afghanistan/ Released)