An aircrew aboard a Coast Guard MH-65C Dolphin helicopter, from Coast Guard Air Station Traverse City, Mich, patrols the skies over Chicago during the 2012 NATO Summit, May 21, 2012. The Coast Guard and partner agencies enforced a temporary flight restriction and conducted security patrols around Chicago during the event. (U.S. Coast Guard photo by Petty Officer 2nd Class George Degener)