Lensman

I heard 5 on the radio, but I think it's really 4. From CNN:


CNN) -- All airports in the United States have been closed by order of the Federal Aviation Administration -- the first time in U.S. history that air traffic nationwide has been halted.

PLANE CRASHES

? American Airlines Flight 11 en route from Boston to Los Angeles

? American Airlines Flight 77 en route from Dulles Airport near Washington to Los Angeles

? United Airlines Flight 93 en route from Newark, New Jersey to San Francisco

? United Airlines 175 en route from Boston to Los Angeles

All international flights heading for the U.S. have been diverted to Canada, the FAA said.

The orders came after two separate airliners crashed into the twin towers of New York's World Trade Center Tuesday morning, collapsing them in clouds of smoke in what U.S. officials called "an apparent terrorist act."

Another aircraft crashed at the Pentagon and part of that building collapsed.

And in another incident, an airliner crashed near Somerset, Pennsylvania, and police said initial reports indicated no survivors.

American Airlines said it had lost two planes in "tragic incidents" and United Airlines said one of its planes was the crash in Pennsylvania and another had also crashed, but would not say where.

United Airlines has grounded all of its flights worldwide.

A 9:45 a.m. EDT message from the FAA hotline in Atlanta, Georgia, said that all domestic flights en route to their destinations will be able to continue. The pilot and airline involved will make the decision on where they will land.

"This was a measure we took because we thought it was prudent," FAA spokeswoman Laura Brown said.