Crews worked Tuesday to try to recover the plane's cockpit and the rest of the remains of the 67 people who died in last week's midair collision between a passenger jet and Army helicopter near the nation's capital. They said their work might depend upon the wind and tidal conditions in the Potomac River, where the aircraft crashed last Wednesday night after colliding as the American Airlines flight was about to land at nearby Ronald Reagan National Airport. All 67 people on both aircraft were killed. By midday, they were working to raise another large piece of the plane. The National Transportation Safety Board said it didn't plan to provide further updates from the scene. Authorities have recovered and identified the remains of 55 of the 67 people and have said they are confident they will find all of the victims. They are focusing first on the jet and hope to recover the Black Hawk helicopter later this week. Col Francis B Pera of the Army Corps of Engineers said salvage crews o