In this April 30, 2020, aerial photo released by China's Xinhua News Agency, vehicles and tents are seen at the base camp at the foot of the peak of Mount Qomolangma, also known as Mount Everest, in southwestern China's Tibet Autonomous Region. China sent scientists to climb Mount Everest while the world's highest peak is empty of commercial climbers because of the coronavirus pandemic. (Purbu Zhaxi/Xinhua via AP)