NEW YORK – Columbia University on April 29 began suspending pro-Palestinian student activists who refused to disband an encampment of tents on its New York campus after the Ivy League school declared a stalemate in talks seeking to end the polarising protest. University president Nemat Minouche Shafik said in a statement that days of negotiations between student organisers and academic leaders had failed to persuade demonstrators to dismantle the dozens of tents they set up to express opposition to Israel’s war in Gaza. The university sent protesters a letter in the morning on April 29 warning that students who did...