U.S.-Israel Cooperation Expansion Act This bill states U.S. policy concerning U.S. and Israeli law enforcement training and threats to U.S. and Israeli security and embassy protection. Specifically, the bill provides that it is U.S. policy to (1) support bilateral training between U.S. and Israeli law enforcement for sharing best practices related to anti-terrorism, community policing, and managing mass casualties; and (2) continue to counter threats to U.S. and Israeli security and embassy protection posed by illicit cross-border tunneling and unmanned aerial systems.