ISTANBUL, Turkey (AP) - Disaster relief teams from around the world joined overwhelmed Turkish crews Wednesday in searching for bodies and aiding survivors after an earthquake killed more than 2,000 people in an overwhelming show of nature's power. Layer by layer, from thousands of sites around western Turkey, the ruins of homes and apartment buildings gave up their dead, many in the pajamas and nightgowns they wore when the immense temblor wreaked its 45 seconds of terror and destruction Tuesday before dawn. Some bodies were shrouded in blankets and sheets of their own beds. The outpouring of international assistance is certain to accelerate the work among the toppled buildings and homes. But the outside teams may also face frustrating logistical problems of reaching remote villages and Istanbul shantytowns. Geophysicists at the U.S. National Earthquake Information Center described the quake as one of the most powerful recorded in the 20th century.