Time magazine says there's no Yusuf Islam on the "no-fly" list, but there is a Youssouf Islam. That's why Islam's passport didn't raise red flags when the former singer boarded a plane in London. However, once the plane was in the air, somebody must have figured that Youssouf Islam is Yusuf Islam, who is Cat Stevens, who is Steven Demetre Georgiou. - Richard Roper, Chicago Sun-Times
In case you were wondering what really happened to Cat Stevens when he was turned away from flying into the U.S., here's his account.