Record-breaking 3 million travelers screened by TSA in a single day [Video]

Travelers heading home after the Thanksgiving holiday set a record on Sunday, as airport officers screened more than 3 million people.The Transportation Security Administration said Monday that it handled 3.09 million travelers on Sunday, breaking the previous record by about 74,000. That mark was set on July 7, also a Sunday after a holiday.Hundreds of thousands of travelers were delayed or had their flights canceled. Airlines canceled about 120 U.S. flights — not an unusually high number — and more than 6,800 flights were delayed, according to FlightAware. The largest numbers of delays were at Hartsfield–Jackson Atlanta International Airport and Chicago’s O’Hare International Airport.Monday was also expected to be a busy day. By midday, there were about 80 canceled flights and more than 2,000 delays.Amtrak rail service between Philadelphia and New York was temporarily stopped Monday because of damage to overhead electrical wires.And some travelers trying to return home faced …