1.   Agents will patrol venues on snowmobiles and skis.

2.   Federal agents patrolled the perimeter of the building, assisted by bomb-sniffing dogs.

3.   Sharpshooters were on rooftops, Secret Service agents patrolled inside and fighter jets roamed the nearby skies.

4.   Some agents openly patrolled the streets, while others set up an office in a mobile home and sought tips from cooperative residents.

5.   The agents patrol the Mexican desert with a few trucks and a couple of horses.

6.   Throughout the day, Secret Service agents patrolled the corridors along with hall monitors, and bomb-sniffing dogs examined the backpacks of slouching students.

7.   Plainclothes agents with earphones patrolled the plaza in front of the cathedral.

8.   Agents patrolled with sniffer dogs and combed the damp lawn with metal detectors, apparently searching for shell casings.

9.   Armed federal agents patrol the grounds, and the heavily fortified buildings are open only to court employees and lawyers.

10.   Black-uniformed Secret Service agents with machine guns patrolled the White House grounds.