Reuters reports that “a Delaware Air National Guard base used by Vice President Joseph Biden boosted its security level on Wednesday after a number of vehicles approached the gates, raising suspicion, a base spokesman said.”  

“Five vehicles stopped at the New Castle Air National Guard Base gates near Wilmington, ostensibly to ask for directions, on Monday and Tuesday, said Lieutenant Colonel Len Gratteri.”  

“It was not uncommon for drivers to ask for directions, he said, but the sudden increase in the number of cars stopping put security officials on the alert.”