The result was the United States Capitol, one of the most recognizable political buildings in the world. Inside its walls lie massive chambers where laws are written, historic rooms where presidents ...

This private subway system connects the Capitol to congressional office buildings through 100-year-old tunnels.

WASHINGTON — "Hold the line!" shouted Paul Irving, the top U.S. House security official, into his cellphone while striding down a U.S. Capitol corridor, with me by chance trailing him. "And make sure ...