A Palestinian doctor treats a patients at an UNRWA-run clinic in al-Nusirat refugee camp in the Gaza strip on January 17, 2018 after the White House froze tens of millions of dollars in contributions. - The agency provides Palestinian refugees and their descendants across the Middle East with services including schools and medical care, but Prime Minister Benjamin Netanyahu has long accused it of hostility toward Israel and called for its closure. (Photo by MAHMUD HAMS / AFP)        (Photo credit should read MAHMUD HAMS/AFP/Getty Images)