Indonesian rescuers raced to evacuate thousands of people Thursday after a volcano erupted five times, forcing authorities to close a nearby airport and issue a warning that the crater collapsing into the sea could cause a tsunami. Mount Ruang's crater flamed with lava against a backdrop of lightning bolts overnight after eruptions pushed an ash column more than a mile into the sky and forced authorities to raise their alert to the highest level of a four-tiered system.
