BOSTON (Reuters) – Tamerlan Tsarnaev, the Boston Marathon bombing suspect killed in a shootout with police, had bought two large packages of fireworks in February from a store in Seabrook, New Hampshire, the company that runs the store said on Tuesday. The amount of explosive powder in the purchased fireworks would not have been “anywhere near enough” to build the bombs used in the April 15 attack as they have been described publicly, said William Weimer, vice president at Phantom Fireworks. More potent powdered explosives could be readily obtained at a gun store, he said. …