BALTIMORE, Md. -- Four UH-1N Iroquois from the 1st Helicopter Squadron at Joint Base Andrews, Md., tighten up their formation as they prepare to fly over Camden Yards for the Baltimore Orioles season opener April 6. The 1st Helicopter Squadron's primary mission is to support key government officials as well as search and rescue missions.(U.S. Air Force photo/ Staff Sergeant Matt Coleman-Foster)