Bat-Galim Shaer (R) and Iris Yifrah (C), mothers of two of the three Israeli teens who were abducted and killed in the occupied West Bank, mourn during the joint funeral of their sons in the Israeli city of Modi'in . Tens of thousands of mourners joined in an outpouring of national grief on Tuesday at the burial of the three Israeli teenagers, Gil-Ad Shaer, U.S.-Israeli national Naftali Fraenkel, both 16, and Eyal Yifrah, 19, whose kidnapping and killing Israel blamed on the Palestinian Islamist group Hamas. The Islamist group has neither confirmed nor denied involvement in the disappearance of the students as they hitchhiked near a Jewish settlement on June 12 nor in the cross-border rocket salvoes from Gaza.BAZ RATNER/Reuters