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CHICAGO, IL - JUNE 02:  A sign directs travelers to a security checkpoint staffed by Transportation Security Administration (TSA) workers at O'Hare Airport on June 2, 2015 in Chicago, Illinois. The Department of Homeland Security said that the acting head of the TSA would be replaced following a report that airport screeners failed to detect explosives and weapons in nearly all of the tests that an undercover team conducted at airports around the country.  (Photo by Scott Olson/Getty Images)
CHICAGO, IL - JUNE 02:  A sign directs travelers to a security checkpoint staffed by Transportation Security Administration (TSA) workers at O'Hare Airport on June 2, 2015 in Chicago, Illinois. The Department of Homeland Security said that the acting head of the TSA would be replaced following a report that airport screeners failed to detect explosives and weapons in nearly all of the tests that an undercover team conducted at airports around the country.  (Photo by Scott Olson/Getty Images)

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    British Muslim family stopped from flying to U.S.

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British Muslim family stopped from flying to U.S.

A British Muslim family demands answers from the U.S. Department of Homeland Security after being barred from boarding a plane to Los Angeles. CNN's Rene Marsh reports.

British Muslim family stopped from flying to U.S.

A British Muslim family demands answers from the U.S. Department of Homeland Security after being barred from boarding a plane to Los Angeles. CNN's Rene Marsh reports.