Documents produced by the Department of Homeland Security indicate that in fiscal 2010 the department is planning to catch only 26 percent of travelers committing major criminal violations while seeking to enter the United States through international airports.
DHS documents also indicate that the department believes it will fail to screen against law enforcement databases 15 percent of travelers entering the United States in 2010 through all official ports of entry.
http://www.cnsnews.com/news/article/59213