124 million people enter the U.S. through our nation's airports each year. It's a nonstop human tidal wave and hid amongst them are an endless stream of contraband and ill intentions. Defending our borders are the vigilant men and women of the Department of Homeland Security, whose agencies make up a three-tiered defense of 124 million people enter the U.S. through our nation's airports each year. It's a nonstop human tidal wave and hid amongst them are an endless stream of contraband and ill intentions. Defending our borders are the vigilant men and women of the Department of Homeland Security, whose agencies make up a three-tiered defense of America's airports. DHS will stop at nothing to catch a smuggler.America's airports. DHS will stop at nothing to catch a smuggler.