In surveillance video recorded at a Boston gym and obtained by CNN, the manager - who was off-camera - asked the brothers to take off their shoes, as stated on the gym's posted rules.
Dzhokhar Tsarnaev, 19, complies right away. Tamerlan Tsarnaev, 26, refuses to take off his shoes and argues instead.
The manager later e-mailed the owner asking him to ban Tamerlan Tsarnaev, saying he's arrogant, selfish and never helps anyone else.Video shows Boston bombing suspects at gym days before attack
CNN's Shannon Travis sits down with the Boston Marathon bombing suspects' uncle for an exclusive interview.
CNN's Nick Paton Walsh briefly engages with the father of the Tsarnaev brothers as he was driving away from his home in Dageston.