Nomadic camel herders lead their herd to a watering hole in rural Somaliland, northern Somalia, Africa

A camel herd in the Fezzan desert, Libya, North Africa, Africa

Camel herder, Pushkar Fair, Rajasthan state, India, Asia

Camel herder and bedouin life in the desert at Al Ain in Abu Dhabi, United Arab Emirates

Camel herder, Bedouin, at Al Ain in Abu Dhabi, United Arab Emirates

Camel herder and bedouin life in the desert at Al Ain, Abu Dhabi, United Arab Emirates

A Mongolian camel herder stands proudly in front of his camels in the middle of the sand dunes of the Gobi Desert. Mongolia, Central Asia, Asia

Camels being led over dunes of the Erg Chebbi sand sea, part of the Sahara Desert near Merzouga, Morocco, North Africa, Africa

Camels being led over dunes of the Erg Chebbi sand sea, part of the Sahara Desert near Merzouga, Morocco, North Africa, Africa

Camel herder early in the morning at the Pushkar Camel Fair, Pushkar, Rajasthan, India, Asia

A camel herder in Mongolia, Central Asia, Asia

Camels on way to Pushkar Mela, camel and cattle market, Pushkar, Rajasthan, India, Asia

Camel herder under beautiful milky way in Mongolian gobi desert, Umnugobi province, Mongolia, Asia

Camel traders and herders sit in a tea hut in a camel market in El Obeid, Sudan on February 16, 2006. Yussuf Gamaa, 2nd from L, is a camel herder from Darfur. About 150,000 camels cross over from Sudan into Egypt every year, the majority as cattle as an inexpensive source of protein. Today the camel is both the caravan and the cargo. Camels from this market will travel the Forty Days Road or Darb el-Arbein a 1,200 mile desert trail into Egypt and the oldest trade route in the Sahara. Desert nomads like Yussuf depend on the profitable camel trade for their livelihood.