U.S.-U.K. AGREEMENT Ursula Brennan, Britain's permanent undersecretary for defense, and Deputy Defense Secretary William J. Lynn III sign an agreement concerning the U.S.-U.K. program to counter improvised explosive devices at the end of a meeting at the Pentagon, Feb. 1, 2011. Frank Kenlon, right, director for international negotiations, looks on. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 706550-I-UQA89-803.jpg Photo Gallery