The Hajj, the annual Islamic pilgrimage to Mecca, is a once-in-a-lifetime obligation for Muslims who are physically and financially able to perform it. It’s a deeply spiritual journey — one that pilgrims dream of for years — but it is also physically demanding and emotionally intense. Pilgrims carry out the five-day ritual outdoors, often under searing heat, among massive crowds. (AP Video: Baraa Anwer)