1.   There is heightened security around Heathrow following the bomb threats.

2.   Amid heightened security, officials closed local courthouses and post offices, closed airports, evacuated LAX and sent home all non-essential employees from the Federal Building.

3.   Americans will also face heightened security measures at government buildings and landmarks.

4.   Another seismic change will be heightened security measures.

5.   Anti-Castro protesters were expelled from the island on Tuesday amid heightened security precautions.

6.   Are people choosing to drive rather than fly in the wake of heightened security procedures?

7.   As for the drugs themselves, Brennan said she had initially believed that heightened security would make traffickers reluctant to bring them into New York.

8.   At least one flight that left Logan Tuesday morning encountered heightened security precautions upon landing elsewhere.

9.   At Yankee Stadium in the Bronx, heightened security must compete with what has been a perennial sense of pennant fever in New York.

10.   Automakers, in particular, ran short of parts as trucks were delayed by heightened security at the Canadian border.