ISLAMABAD, Dec. 9 -- Pakistan's newly appointed armed forces chief called on Afghanistan's Taliban government on Monday to choose between maintaining ties with Islamabad or supporting the Pakistani Taliban, the militant group blamed for a surge in deadly attacks in recent years. General Asim Munir made his remarks at his headquarters in Rawalpindi, where he received a guard of honor from all three branches of the military, marking the launch of Pakistan's new joint military command. His appointment was confirmed last week in what officials said would improve coordination among the army, navy and air force, amid shifting regional security dynamics. Munir told officers that a "clear message" had been delivered to the Taliban government in Kabul: it must decide between Pakistan and "Fitna al-Khawarij," a term authorities use for the outlawed Pakistani Taliban, known a s Tehrik-e-Taliban Pakistan, or TTP....