TEMPE, Greece (AP) — Rescuers searched late into the night Wednesday for survivors amid the mangled, burned-out wrecks of two trains that collided in northern Greece, killing at least 43 people and crumpling carriages into twisted steel knots in the country’s deadliest rail crash. PASSENGERS SAY TRAIN CRASH WAS LIKE AN EXPLOSIONA teenage survivor who did not give his name to reporters said that just before the crash he felt sudden braking and saw sparks — and then there was a sudden stop. Minor clashes broke out as some protesters threw stones at the offices of Greece’s rail operator and riot police and set dumpsters on fire