1.   Emergencies were Declared in six states as airports were shut down, stranding travelers across the country.

2.   But the New York airports were abruptly shut soon after they reopened, and law enforcement officials took the people into custody at Kennedy and LaGuardia.

3.   Flights that were already in the air when the airports were shut were diverted to Sacramento and, in some cases, Los Angeles.

4.   In the hours after the attacks, when he heard the airports were shut, Monahan quickly thought ahead.

5.   The breach prompted officials to shut the airport for three hours, stranding travelers and upsetting East Coast air travel.

6.   The government last month abandoned most of the temporary restrictions imposed after the terrorist attacks when every airport in the country was shut.

7.   Thousands of travelers were stranded, as major airports were shut down, highways closed and trains delayed.

8.   All Canadian airports were shut down indefinitely Tuesday, with all domestic and international flights grounded, in the aftermath of terrorist attacks in New York and Washington.

9.   Authorities finally shut the airport when fighting broke out in the city proper.

10.   Officials shut airports in its path and opened shelters as residents crowded supermarkets and grocery stores for last-minute supplies of batteries and food.