Impervious Shield Elusive Against Drive-By Terrorists

“The United States has spent more than $1 billion on these and other efforts to stop a single threat: the explosion of a car or truck bomb at a government installation or other structure. But 11 years after Muslim extremists used an explosives-laden van to attack the World Trade Center and nearly three years after the Sept. 11, 2001, terrorist attacks, even senior federal agents acknowledge that the country has virtually no defense against a terrorist barreling down the street with a truck bomb.” (Washington Post)