A mule drinks from a basin at a washing place for porters and trekkers at Khoburtse along the K2 base camp trek in the Karakoram mountain range in Pakistan September 1, 2014. A mule can cost between 120,000 and 150,000 Pakistani Rupees (around $1,100 – $1,400) and can earn around $20 per working day for its owner. (Photo by Wolfgang Rattay/Reuters)
