Extremism is rearing its ugly head in Egypt at an accelerated clip. Yesterday, attacks by militants reportedly killed more than 100 in Northern Sinai, including 17 soldiers. The Egyptian military, which scrambled war planes and helicopters to fight the jihadists, claims the region is again under control. But the attack came just days after extremists killed a top prosecutor in Cairo. And it raises fears that the militants could be increasingly coordinating with ISIS, adding pressure to Abdel-Fattah el-Sissi’s presidency — and greater instability to the region.