CNN The Lead With Jake Tapper November 23, 2015 21:28:00
>> reporter: the department of homeland security tested first responders and nypd's response to a terror attack on mass transit. the results of the training will be shared with law enforcement nationwide. nearly 47 million americans are expected to travel by car this thanksgiving, and an additional 25 million will fly on u.s. carriers. as the volume of people on the move increases, more officers and canines have deployed to potentially vulnerable sites, at train and bus stations there are increased patrols. in major cities like new york and washington, riders should expect random bag checks, b...