KANDAHAR, Afghanistan (Reuters) - It is unclear if the United States will be able to pay troops on time in the event of a debt default, the top U.S. military officer told troops in Afghanistan on Saturday. (http://feeds.feedburner.com/~ff/reuters/topNews?d=yIl2AUoC8zA) (http://feeds.feedburner.com/~ff/reuters/topNews?i=tel2aYAdaOU:1gYIrFj-IpQ:V_sGLiPBpWU) (http://feeds.feedburner.com/~ff/reuters/topNews?i=tel2aYAdaOU:1gYIrFj-IpQ:-BTjWOF_DHI) (http://feeds.feedburner.com/~r/reuters/topNews/~4/tel2aYAdaOU)