K-9 screens secret service vehicles
An Allegheny County Police officer and his working dog, a Belgian Malinois
Shepherd, carefully screen a vehicle for the possible detection of
explosives, April 17, 2012. This particular vehicle was part of Michelle
Obama's secret service and used to provide security during her visit to
Pittsburgh. The first lady met with more than 20 military members and their
families at the 911th Airlift Wing, Air Force Reserve Base, before leaving
for a meeting. (U.S. Air Force photo by Tech. Sgt. Ralph Van
Houtem/Released)