In this photo by Tashi Sherpa, a bird flies over tents set up for climbers at base camp on Mount Everest in Nepal. The government is operating a full-time office tent at base camp and more medical staff are working there this year, as Nepal works to address concerns and lure back climbers following the deadly avalanche last year. The disaster that killed 16 Sherpa guides forced an early end to last year's climbing season. Mountaineering officials have extended some climbers' permits and cut fees this year, and Gyanendra Shrestha, an official at Nepal's Mountaineering Department, has said more than 40 teams were expected to make Everest summit attempts. The climbing season on Nepal's Himalayan peaks runs from March to May.