U.S.-India engagement on shared security interests is a topic of interest to the U.S. Congress, where there is considerable support for a deepened U.S. partnership with the world's largest democracy. Congressional advocacy of closer relations with India is generally bipartisan and widespread; House and Senate caucuses on India and Indian-Americans are the largest of their kind. Caucus leaders have encouraged the Obama Administration to work toward improving the compatibility of the U.S. and Indian defence acquisitions systems, as well as to seek potential opportunities for co-development or co-production of military weapons systems with India. A deepened strategic partnership with India will be critical to the promotion of core mutual national interests in the 21st century. This book reviews the major facets of U.S.-India security relations with a focus on military-to-military contracts, counter-terrorism and intelligence co-operation, and defence trade.