UPDATE 2-U.S. House panel to force testimony from Trump's Afghan envoy

The U.S. House of Representatives Foreign Affairs Committee said on Thursday it will subpoena President Donald Trump's special Afghanistan envoy, Zalmay Khalilzad, to testify on Sept. 19, after the abrupt cancellation of talks with the country's Taliban militia.Representative Eliot Engel, the committee's Democratic chairman, said he signed the subpoena after the U.S. State Department ignored numerous requests for briefings by Khalilzad about the Afghanistan peace plan and the administration's pa