Security got even tighter after July 24, 1998, when a man charged into the Capitol, shot and killed two police officers, and wounded a female tourist.
Even so, the Senate and House office buildings on Capitol Hill remain among the more open of the federal edifices. After being checked at the entrance, visitors are free to enter any hearing room or office.
"The Capitol has elected officials," Ritchie said. "They increased security, but tried to make it as accessible as possible."