Border security

" Within DHS, the U.S. Customs and Border Protection's (CBP) OAM deploys the largest law enforcement air force in the world. In support of homeland security missions, OAM provides aircraft, vessels, and crew at the request of the its customers, primarily Border Patrol, which is responsible for enforcing border security, and tracks its ability to meet requests. GAO was asked to determine the extent to which OAM (1) met its customers' requests; (2) has taken steps to ensure its mix and placement of resources effectively met mission needs and addressed threats; and (3) coordinated the use of its assets with the USCG, which is to execute its maritime security mission using its assets. GAO reviewed DHS policies, interviewed OAM, Border Patrol, U.S. Immigration and Customs Enforcement, and USCG officials in headquarters and in 4 field locations selected on factors, such as threats and operating environments. Results from these field visits are not generalizable. GAO analyzed OAM support request data for fiscal year 2010, and surveyed OAM and USCG officials at 86 proximately located units to determine the extent of cooperation between the two agencies. This report is a public version of a law enforcement sensitive report GAO issued in February 2012. Information deemed sensitive has been redacted. "