A Palestinian vendor sells pickles in a street market on the first day of the holy month of Ramadan, in Rafah in the southern Gaza Strip on June 18, 2015, as the faithful prepare to start fasting. More than 1.5 billion Muslims around the world will mark the month, during which believers abstain from eating, drinking, smoking and having sex from dawn until sunset. Photo by Abed Rahim Khatib /Flash 90

A Palestinian vendor sells falafel in a street market on the first day of the holy month of Ramadan, in Rafah in the southern Gaza Strip on June 18, 2015, as the faithful prepare to start fasting. More than 1.5 billion Muslims around the world will mark the month, during which believers abstain from eating, drinking, smoking and having sex from dawn until sunset. Photo by Abed Rahim Khatib /Flash 90

A Palestinian vendor prepares traditional pancakes known as ''Qatayef'' at his shop which was destroyed during the 50-day Israeli war in the summer of 2014, on the first day of the holy month of Ramadan, in Rafah in the southern Gaza Strip on June 18, 2015, as the faithful prepare to start fasting. More than 1.5 billion Muslims around the world will mark the month, during which believers abstain from eating, drinking, smoking and having sex from dawn until sunset. Photo by Abed Rahim Khatib /Flash 90

A Palestinian vendor prepares traditional pancakes known as ''Qatayef'' at his shop which was destroyed during the 50-day Israeli war in the summer of 2014, on the first day of the holy month of Ramadan, in Rafah in the southern Gaza Strip on June 18, 2015, as the faithful prepare to start fasting. More than 1.5 billion Muslims around the world will mark the month, during which believers abstain from eating, drinking, smoking and having sex from dawn until sunset. Photo by Abed Rahim Khatib /Flash 90