By Jenn Bernstein

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PHILADELPHIA (CBS) – Passengers of U.S. Airways Flight 777, said the ride and landing from Shannon, Ireland was smooth.

It wasn’t until the plane taxied to an isolated part of runway at Philadelphia International Airport, they realized all wasn’t routine (see previous story).

“At first they said we couldn’t pull into the gate,” said passenger Molly Cross, “they said something was going on but wouldn’t tell us what was happening.  And then, once we saw all the cop cars and dogs and everything, an FBI agent got on the plane and told us someone made a bomb threat, or something.”

“A policeman came on actually at the front of the plane, and we could see him because I was in row one, and he said that it was a security issue that it had been a prank call,” said passenger Aminda Baird.

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Molly Cross was back from a summer trip in Ireland after college graduation.

She says passengers were put on buses, then interviewed by the FBI.

Dogs also sniffed their bags.

“I got a little nervous at first but once they got us off the plane I felt better,” said Cross.

Elanor Cousart had to be helped off the plane by firefighters.

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“The firemen came in and put me in a chair, strapped me in, and carried me down the steps,” said Cousart.