Mr. Mercer is giving evidence to an inquiry that is delving into killings allegedly carried out by UK special forces in Afghanistan between 2010 and 2013.
Thomas Speciale remembers exactly where he was on Sept. 11, 2001, and unique sense of patriotism and national unity in the days and weeks that followed.
House Foreign Affairs Committee Chairman Mike McCaul has called for nine current and former U.S. diplomats to testify about their role in the chaotic U.S. withdrawal efforts from Afghanistan two years ago.