Palestinians wait for travel permits to cross into Egypt, at the Rafah border crossing between Egypt and the southern Gaza Strip, on June 13, 2015. Egyptian authorities opened the Rafah border crossing on Saturday for three days, officials said. Rafah is the only major crossing between impoverished Gaza, home to 1.8 million Palestinians, and the outside world that does not border Israel, which blockades the strip and allows passage mainly on humanitarian grounds. Egypt shut the crossing in October last year after Islamist militants in Egypt's adjacent Sinai region killed members of its security forces. Since then, it opened the crossing partially and on a few occasions to allow thousands of Palestinians to travel in and out of the Gaza Strip. Photo by Abed Rahim Khatib/Flash90

Palestinians wait for travel permits to cross into Egypt, at the Rafah border crossing between Egypt and the southern Gaza Strip, on June 13, 2015. Egyptian authorities opened the Rafah border crossing on Saturday for three days, officials said. Rafah is the only major crossing between impoverished Gaza, home to 1.8 million Palestinians, and the outside world that does not border Israel, which blockades the strip and allows passage mainly on humanitarian grounds. Egypt shut the crossing in October last year after Islamist militants in Egypt's adjacent Sinai region killed members of its security forces. Since then, it opened the crossing partially and on a few occasions to allow thousands of Palestinians to travel in and out of the Gaza Strip. Photo by Abed Rahim Khatib/Flash90

Palestinians wait for travel permits to cross into Egypt, at the Rafah border crossing between Egypt and the southern Gaza Strip, on June 13, 2015. Egyptian authorities opened the Rafah border crossing on Saturday for three days, officials said. Rafah is the only major crossing between impoverished Gaza, home to 1.8 million Palestinians, and the outside world that does not border Israel, which blockades the strip and allows passage mainly on humanitarian grounds. Egypt shut the crossing in October last year after Islamist militants in Egypt's adjacent Sinai region killed members of its security forces. Since then, it opened the crossing partially and on a few occasions to allow thousands of Palestinians to travel in and out of the Gaza Strip. Photo by Abed Rahim Khatib/Flash90

Palestinians wait for travel permits to cross into Egypt, at the Rafah border crossing between Egypt and the southern Gaza Strip, on June 13, 2015. Egyptian authorities opened the Rafah border crossing on Saturday for three days, officials said. Rafah is the only major crossing between impoverished Gaza, home to 1.8 million Palestinians, and the outside world that does not border Israel, which blockades the strip and allows passage mainly on humanitarian grounds. Egypt shut the crossing in October last year after Islamist militants in Egypt's adjacent Sinai region killed members of its security forces. Since then, it opened the crossing partially and on a few occasions to allow thousands of Palestinians to travel in and out of the Gaza Strip. Photo by Abed Rahim Khatib/Flash90

Palestinians wait for travel permits to cross into Egypt, at the Rafah border crossing between Egypt and the southern Gaza Strip, on June 13, 2015. Egyptian authorities opened the Rafah border crossing on Saturday for three days, officials said. Rafah is the only major crossing between impoverished Gaza, home to 1.8 million Palestinians, and the outside world that does not border Israel, which blockades the strip and allows passage mainly on humanitarian grounds. Egypt shut the crossing in October last year after Islamist militants in Egypt's adjacent Sinai region killed members of its security forces. Since then, it opened the crossing partially and on a few occasions to allow thousands of Palestinians to travel in and out of the Gaza Strip. Photo by Abed Rahim Khatib/Flash90

Palestinians wait for travel permits to cross into Egypt, at the Rafah border crossing between Egypt and the southern Gaza Strip, on June 13, 2015. Egyptian authorities opened the Rafah border crossing on Saturday for three days, officials said. Rafah is the only major crossing between impoverished Gaza, home to 1.8 million Palestinians, and the outside world that does not border Israel, which blockades the strip and allows passage mainly on humanitarian grounds. Egypt shut the crossing in October last year after Islamist militants in Egypt's adjacent Sinai region killed members of its security forces. Since then, it opened the crossing partially and on a few occasions to allow thousands of Palestinians to travel in and out of the Gaza Strip. Photo by Abed Rahim Khatib/Flash90

Palestinians wait for travel permits to cross into Egypt, at the Rafah border crossing between Egypt and the southern Gaza Strip, on June 13, 2015. Egyptian authorities opened the Rafah border crossing on Saturday for three days, officials said. Rafah is the only major crossing between impoverished Gaza, home to 1.8 million Palestinians, and the outside world that does not border Israel, which blockades the strip and allows passage mainly on humanitarian grounds. Egypt shut the crossing in October last year after Islamist militants in Egypt's adjacent Sinai region killed members of its security forces. Since then, it opened the crossing partially and on a few occasions to allow thousands of Palestinians to travel in and out of the Gaza Strip. Photo by Abed Rahim Khatib/Flash90

Palestinians wait for travel permits to cross into Egypt, at the Rafah border crossing between Egypt and the southern Gaza Strip, on June 13, 2015. Egyptian authorities opened the Rafah border crossing on Saturday for three days, officials said. Rafah is the only major crossing between impoverished Gaza, home to 1.8 million Palestinians, and the outside world that does not border Israel, which blockades the strip and allows passage mainly on humanitarian grounds. Egypt shut the crossing in October last year after Islamist militants in Egypt's adjacent Sinai region killed members of its security forces. Since then, it opened the crossing partially and on a few occasions to allow thousands of Palestinians to travel in and out of the Gaza Strip. Photo by Abed Rahim Khatib/Flash90

Palestinians gather at the Rafah border crossing in the southern Gaza Strip, as they await permission to enter Egypt on June 12, 2015. Egypt is due to reopen its Rafah border crossing with Gaza for three days. The Rafah crossing point between Egypt and the Gaza Strip will open three days from Saturday to allow entry and exit of Gazan patients and students, Palestinian and Egyptian officials said. Photo by Aaed Tayeh/Flash90

Palestinians gather at the Rafah border crossing in the southern Gaza Strip, as they await permission to enter Egypt on June 12, 2015. Egypt is due to reopen its Rafah border crossing with Gaza for three days. The Rafah crossing point between Egypt and the Gaza Strip will open three days from Saturday to allow entry and exit of Gazan patients and students, Palestinian and Egyptian officials said. Photo by Aaed Tayeh/Flash90

Palestinians gather at the Rafah border crossing in the southern Gaza Strip, as they await permission to enter Egypt on June 12, 2015. Egypt is due to reopen its Rafah border crossing with Gaza for three days. The Rafah crossing point between Egypt and the Gaza Strip will open three days from Saturday to allow entry and exit of Gazan patients and students, Palestinian and Egyptian officials said. Photo by Aaed Tayeh/Flash90

Palestinians gather at the Rafah border crossing in the southern Gaza Strip, as they await permission to enter Egypt on June 12, 2015. Egypt is due to reopen its Rafah border crossing with Gaza for three days. The Rafah crossing point between Egypt and the Gaza Strip will open three days from Saturday to allow entry and exit of Gazan patients and students, Palestinian and Egyptian officials said. Photo by Aaed Tayeh/Flash90

Palestinians gather at the Rafah border crossing in the southern Gaza Strip, as they await permission to enter Egypt on June 12, 2015. Egypt is due to reopen its Rafah border crossing with Gaza for three days. The Rafah crossing point between Egypt and the Gaza Strip will open three days from Saturday to allow entry and exit of Gazan patients and students, Palestinian and Egyptian officials said. Photo by Aaed Tayeh/Flash90

Palestinians gather at the Rafah border crossing in the southern Gaza Strip, as they await permission to enter Egypt on June 12, 2015. Egypt is due to reopen its Rafah border crossing with Gaza for three days. The Rafah crossing point between Egypt and the Gaza Strip will open three days from Saturday to allow entry and exit of Gazan patients and students, Palestinian and Egyptian officials said. Photo by Aaed Tayeh/Flash90

African refugees sit outside the Holot detention center in southern Israel, on June 13, 2015. African immigrants who cross the border to Israel illegally are held at the Holot detention center until they either leave the country voluntarily, are deported, or are given official refugee status and permitted to stay. They are usually allowed to leave the detention facilities for up to 48 hours. Photo by Hadas Parush/Flash90

African refugees sit outside the Holot detention center in southern Israel, on June 13, 2015. African immigrants who cross the border to Israel illegally are held at the Holot detention center until they either leave the country voluntarily, are deported, or are given official refugee status and permitted to stay. They are usually allowed to leave the detention facilities for up to 48 hours. Photo by Hadas Parush/Flash90