A Palestinian protester uses a slingshot to throw back a tear gas canister fired by Israeli security forces during clashes on March 31, 2018 in occupied West Bank city of Hebron as a general strike is called for by local leaders in solidarity with Gaza. At least 16 Palestinians were killed earlier on Friday in clashes along the Gaza-Israel border as 30,000 Gazans participated in the "March of Return," a series of mass protests slated to continue for weeks. United Nations Secretary-General Antonio Guterres called for an independent and transparent investigation into the deaths and injuries along Gaza's border with Israel. Photo by Wisam Hashlamoun