By Matthew L. Wald, New York Times

The National Transportation Safety Board said it would investigate the landing before dawn on Monday of a Delta Air Lines flight from Rio de Janeiro to Atlanta on a taxiway at the Atlanta Hartsfield International Airport, rather than on the parallel runway to which it had been assigned. There was no traffic on the taxiway at the time, so the plane, a Boeing 767 with 193 people on board, landed without incident. But such landings create the chance of runway collisions.