Subway bomb ignited by Christmas light, matches

NEW YORK - Law enforcement officials say a pipe bomb that exploded in a crowded New York City subway passageway was ignited with a Christmas light, matches and a nine-volt battery.  The officials say the short pipe was packed with explosive powder but didn't work as intended. The blast wasn't powerful enough to turn the pipe into deadly shrapnel.  Authorities have identified the attacker as Akayed Ullah, an immigrant from Bangladesh.  Law en