An man walks past damage caused by an earthquake in Kathmandu, Nepal, Saturday, April 25, 2015. A strong magnitude-7.9 earthquake shook Nepal's capital and the densely populated Kathmandu Valley before noon Saturday, causing extensive damage with toppled walls and collapsed buildings, officials said. (AP)
In this photo released by China's Xinhua News Agency, a collapsed building is seen in Nepal's capital Kathmandu Saturday, April 25, 2015. A strong earthquake shook Nepal's capital and the densely populated Kathmandu Valley before noon Saturday, causing extensive damage with toppled walls and collapsed buildings, officials said. (Xinhua via AP)
People stand on the runway outside the International Terminal after a earthquake hit, at Tribhuvan International Airport, Kathmandu, Nepal, April 25, 2015, in this handout courtesy of Dhany Osman. The massive earthquake measuring 7.9 magnitude struck 80 km (50 miles) east of Pokhara in Nepal on Saturday, causing some buildings in the capital Kathmandu to collapse, witnesses said. (REUTERS)
People stand on the runway outside the International Terminal after a earthquake hit, at Tribhuvan International Airport, Kathmandu, Nepal, April 25, 2015, in this handout courtesy of Dhany Osman. The massive earthquake measuring 7.9 magnitude struck 80 km (50 miles) east of Pokhara in Nepal on Saturday, causing some buildings in the capital Kathmandu to collapse, witnesses said. (REUTERS)
People take refuge at a school after a 7.7 magnitude earthquake struck in Kathmandu, Nepal, April 25, 2015. The earthquake struck 80 km (50 miles) east of Pokhara in Nepal on Saturday, about half-way between the town and the capital Kathmandu, the U.S. Geological Survey said, and witnesses said some buildings in Kathmandu had collapsed. (REUTERS)
People take refuge at a school after a 7.7 magnitude earthquake struck in Kathmandu, Nepal, April 25, 2015. The earthquake struck 80 km (50 miles) east of Pokhara in Nepal on Saturday, about half-way between the town and the capital Kathmandu, the U.S. Geological Survey said, and witnesses said some buildings in Kathmandu had collapsed. (REUTERS)