Trump secretly switched planes amid an Iranian threat, a new report says. Here's a look at his presidential fleet.

President Donald Trump added a new Air Force One, a VC-25B Bridge, to the presidential fleet. Kevin Dietsch/Getty Images US presidents travel in a variety of secure vehicles, including planes, helicopters, and cars. He flies on Air Force One, a militarized Boeing 747, and occasionally a militarized Boeing 757. For shorter trips, presidents use Marine One or a secure limousine known as "The Beast." The president of the United States never has to sit in traffic or fight for the last space in a…