CNN Starting Point April 24, 2013 11:32:00
Brothers allegedly built their bomb. a new hampshire fireworks shop confirms that tamerlan tsarnaev bought products containing about three pounds of black gun powder. he did that two months ago after asking the clerk for the biggest and loudest kit in the store. he did that in new hampshire, a few miles north of here. and happening later today a memorial here in boston for one of the victims. at noon vice president joe biden will attend a service for sean collier, the m.i.t. officer killed during the manhunt for the suspect. meanwhile later this afternoon the house intelligence committee will ...