COPY-Government says Stevens on no-fly list because of possible ties to terrorists

WASHINGTON A top Homeland Security official says a gap in the airline passenger-check system allowed the singer once known as Cat Stevens to board a flight despite being on a no-fly list.

Asa Hutchinson tells A-B-C's "Good Morning America" that the incident involving Yusuf Islam shows a need for changing the system.Hutchinson says under the current rules, the Homeland Security Department finds out about passenger boardings after the plane takes off.He says federal authorities should be allowed to review passenger lists at least an hour before that happens.Islam was deported back to London after the plane was diverted to Maine and he was intercepted by federal agents.United Airlines and the U-S government say they're trying to figure out what happened. Homeland Security officials say it's possible his name was spelled differently on the list.

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