1.   And former Transportation Department Inspector General Mary Schiavo says that in a recent test her staff was able to penetrate security at airports throughout the country.

2.   Never before had Hezbollah penetrated Israeli security.

3.   To penetrate the security of the Pentagon, the D.C. fortress designed by George Edwin Bergstrom, makes an obvious statement of our vulnerability.

4.   To penetrate the security of the hexagonal fortress that is the Pentagon makes an obvious statement of our vulnerability.

5.   As the investigation widened, so did a probe of how the confessed assassin penetrated Israeli security.

6.   It was unclear how the gunmen penetrated the security.

7.   The investigators also penetrated security at Reagan National Airport outside Washington and at the Orlando, Fla., international airports.

8.   The presidential mansion is protected by hundreds of guards, and it was unclear how the gunmen penetrated the security.