A helicopter drops water on the north flank of the Fontenelle Fire outside Big Piney, Wyoming

A helicopter drops water on the north flank of the Fontenelle Fire outside Big Piney, Wyoming, July 4, 2012. Over 800 firefighters are working 15 hour shifts battling the fire that has exceeded 56,000 acres. Record fire danger and long stretches of the red flag warning days have made it challenging to control. The crews are working and sleeping in close proximity to the fire in an effort to contain it. The blaze started on June 24, and in burning in in dead and thick stands of timber and is currently 15 contained. Recently firefighting crews from as far away as Alaska have arrived to fight it. REUTERS/Jim Urquhart (UNITED STATES)