1.   The RUC, the government and politicians are deeply concerned over the heightened level of violence -- five loyalist murders and two massive IRA bombs in eight days.

2.   As a result, the risk of heavy rain and flooding will stay at heightened levels from Boston northward into Maine.

3.   Boeing, the second-largest contractor for the Defense Department, has operated under a heightened level of security since the terrorist attacks.

4.   After the attacks, the FBI immediately warned all local law enforcement agencies to be on a heightened level of alert for possible terrorist retaliation on US soil.

5.   But the growth suggests a heightened level of unprotected sexual activity that almost guarantees an eventual surge in the number of AIDS cases here.

6.   For most Olympic athletes, the once-in-a-lifetime experience raises the competition to a heightened level that Costas finds thrilling.

7.   If he is elected, Bloomberg said his commitment to philanthropy would not change, even with the heightened level of scrutiny it would undoubtedly receive.

8.   Lawmakers returning to Washington this week found a heightened level of security around the Capitol, with more barricades and checkpoints around the complex.

9.   Perry said the changes required to deal with the heightened level of terrorism in Saudi Arabia would be expensive and time-consuming.

10.   Piomelli also found two chocolate ingredients that inhibit the natural breakdown of anandamide, which could lead to heightened levels of the substance in the brain.