Video Shows Boston Bombing Suspects at Gym 72 Hours Before Attack (+video)

Three days before the Boston Marathon bombings, suspects Tamerlan and Dzhokhar Tsarnaev were working out together at a Boston gym.

Security cameras captured footage of the brothers arriving at the Wai Kru mixed martial arts center with a friend just before 2:45 p.m. April 12.

The manager at Wai Kru, who wanted to be identified only as Michael, noticed a distinct change in the older brother’s appearance.

Tamerlan Tsarnaev’s full, bushy religious beard, which he had for about two years, was gone.