Fox News channel is reporting that Continental Airlines flight 1519 scheduled to depart Washington Dulles International Airport at 5:35 p.m. for G.H.W. Bush International Airport in Houston has been canceled due to terror concerns.This particular flight number turned up in electronic intercepts, but no specific info about method, target, etc. was picked up.Continental released a statement saying they could not meet heightened requirements by Homeland Security for the flight so they canceled it. Government sources told Fox News this was not related to the Super Bowl.