security cameras at this mixed martial arts center in boston shows the tsavraev brothers arriving with a friend before 2:45 p.m. on friday, april 12th before they get started, tamerlan tsavraev gets in an argument with the manager about taking otherwise his shoes, a policy at the gym. and then the brothers begin their workout. tamerlan tsavraev here seen skipping rope. remember, the bomb is finished, they have already picked their date. he has had just shaved off his beard. 23 years in prison for attempting to set off what he thought was a bomb outside wrigley field. he was arrested in 2010 in an fbi sting. he pleaded guilty charges to trying to set off explosives. new developments in the case of the hatchet wielding
sort of consistent with how casual they are. odd. the behavior leading up to the attack. didn t try to hide. weren t staying away from people and afterward with the four days we had in boston with their you know, the fact that they had no exit strategy. but you see tamerlan. he s you know, we know now from his biography, he was a bully. very belligerent. that martial arts is consistent with that. and the fight he leading into the gym seems to be part of the narrative. so interesting. you talk about the manager of the gym saying, you know, he didn t want to ask him about the beard being gone, didn t want to get into a long, drawn out conversation that could be contentious. and the argument about taking his shoes off. it almost seems as though this is a guy walking around with a big chip on his shoulder.
the brothers arriving with a friend. we spoke to the manager, who asked that we only use his first name, michael. he said tamerlan who you see in the hat looked differently. noticeably missing, tamerlan s fu full, bushy religious beard. the manager describes tamerlan as extremely opinionated and outspoken about his muslim religion and didn t ask tamerlan why he had shaved. now he wonders whether tamerlan s shaving the beard might have been part of a ritual purification prior to death. shaving the beard may be a way to blend in, not to attract scrutiny from security services in carrying out the boston attacks. reporter: tamerlan trained at y crew for several times a month for free, professional courtesy to the golden gloves boxer. dzhokhar rarely came, showing up