Today is April 20, better known as 420 day. If you don't know what it refers to then good for you. If you do know then you know how people celebrate it.
The NFL celebrates in a different way then most people. Today is the first official day the NFL starts drug testing it's players.
If a player is not in the drug program, meaning they haven't test positive before, they only get tested once a year.
Some people don't like the NFL's drug policy and there are certainly holes in the system. Hopefully the system in place will deter future athletes from using marijuana.