QUETTA, Pakistan (AP) — A suicide attacker drove an explosives-packed vehicle into the vicinity of a railway line just as a passenger train was passing through the southwestern city of Quetta on Sunday, killing at least 19 people and injuring more than 70 others, authorities reported. The powerful blast caused two train carriages to derail and burst into flames, with thick black smoke rising above the scene, as seen in videos posted online. The bombing occurred in an area typically monitored by