The plot to blow up a passenger jet was launched by al-Qaeda leaders in Yemen who apparently sewed bomb materials into the suspect's underwear.The suspect had more than 80 grams of PETN, a compound related to nitro-glycerin. Yesterday's bomb failed because the detonator may have been too small or was not in "proper contact" with the explosive material.Abdulmutallab made contact via the internet with a radical imam in Yemen who then connected him with al-Qaeda leaders. The suspect lived with the al-Qaeda leader in Yemen for about a month and was not allowed to leave as he was trained in...