'Inside the U.S. Secret Service'

This show airs tonight from 8 to 10 p.m. Eastern on the National Geographic Channel (Direct TV channel 276).

I can't wait.

I find the whole Secret Service ethos fascinating.

That people can be trained to disregard their own powerful natural survival instincts and step in front of the President to take a bullet meant for him - as agent Tim McCarthy did in 1981,

saving the life of Ronald Reagan - is amazing and profound.

Whenever the President is on TV, I find it far more interesting and educational to watch the Secret Service agents protecting him as they constantly scan the crowd,

watching the hands - always the hands.