What it's like to try out for the U.S. Secret Service's elite Counter Assault Team

Nate Burleson, formerly a wide receiver in the NFL, is co-host of "CBS Mornings."

As a former NFL player, I thought I knew what it meant to be tested, but a recent morning spent with the U.S. Secret Service's Counter Assault Team in Laurel, Maryland, proved me wrong. This elite law enforcement unit, responsible for protecting the American President, Vice President, visiting world leaders, and the financial system, takes dedication and resilience to a whole new level.