“This is more of a challenge to the government and the state’s authority than there ever was before,” said Kamal Habib, a founding member of Islamic ­Jihad, a group that was at the forefront of a similar revolt in Egypt in the 1990s but that later renounced violence. He noted that today’s insurgents are using heavier weapons, such as missiles and bombs. The bus blew up Sunday afternoon when it was parked just 200 yards from the Israeli border in the resort town of Taba, sending black plumes of smoke into the sky, according to images on Egyptian state television. There was no immediate assertion of responsibility for the attack, which killed two South Korean tourists and the Egyptian bus driver, according to the Health Ministry. It had earlier reported that three tourists were killed. At least 15 South Koreans were wounded. But Habib said the blast indicates that […]