ELLSWORTH AIR FORCE BASE, S.D. -- Airmen from the 28th Bomb Wing await the arrival of a B-1 Lancer as the 28th Civil Engineer Squadron fire department pays tribute to their return at Ellsworth Air Force Base, S.D., March 30, 2011. During Operation Odyssey Dawn, coalition forces struck targets that posed a direct threat to the civilian population or to partner nation aircraft enforcing a United Nations established no-fly zone. (U.S. Air Force photo/Senior Airman Adam Grant)