The nose wheel of a Boeing 757 jet fell off and rolled away while the plane was waiting on the runway for takeoff clearance, with almost 200 people on board.Delta Air Lines Flight 982 was moments away from taking off from Hartsfield-Jackson Atlanta International Airport in Atlanta on Saturday when the wheel "came off and rolled down the hill," according to a preliminary report from the Federal Aviation Administration published Monday.The plane had 172 passengers — as well as two pilots and four ...