Though the specific number of crashes near the checkpoints was not immediately available, the safety board also cited a fatal accident last year near one in Texas.
On the first day, none of the checkpoints was liberated but tough clashes broke out between the FSA and the Syrian army.
But smuggling paperbacks past government checkpoints was foolish to attempt, and impossible to achieve, and so the author resigned herself to sending Bana "lots and lots of love".
On Thursday, two days after the World Trade Center attack, a man who tried to use a false pilot's identification to get past security checkpoints was arrested at Kennedy International Airport.
He compared the likely effect to the actions taken by the Federal Aviation Administration right after Sept. 11, when the flow rate through passenger checkpoints was cut by three-quarters, producing waits of two to three hours.
Indicating that the violence could be a prelude to an effort to force a partition of northern Kosovo, the Serbian minister for Kosovo, Metohija Slobodan Samardzic, said the destruction of the United Nations checkpoints was in line with Serbia's policies.
