U.S. Push To Run Counterterrorism Operations In Afghanistan After 2014 Threatens Security Pact --- KABUL, Oct 2 (Reuters) - A U.S. bid to run unilateral counter-terrorism operations in Afghanistan after 2014 is threatening to derail a security pact between the two countries, an Afghan spokesman said, underlining Afghanistan's tenuous ties with its main backer. --- Most foreign combat troops are due to leave by the end of 2014, and the United States has been putting pressure on Afghanistan to finalise a bilateral security agreement by the end of this month.