The U.S. Army Corps of Engineers (USACE), Baltimore District, together with U.S. Coast Guard (USGC) and U.S. Navy’s Supervisor of Salvage and Diving (SUPSALV), today announced that six days ahead of schedule the Potomac River section affected by the Jan. 29 midair collision of an American Airlines regional jet and a U.S. Army Black Hawk helicopter near Washington’s Ronald Reagan Washington National Airport is now fully restored.