Luci Hamlin and her husband, army specialist Timothy Hamlin, wait to get back to their home on base at Fort Hood, Texas, yesterday, after four people died and 16 were injured when a gunman opened fire at the US military base there. Photograph: Austin American-Statesman/Deborah Cannon/Reuters

The commander of the Fort Hood Army base in Texas identified the soldier suspected of shooting dead three people and wounding 16 on yesterday a(...)

A key feature of Bitcoin is near total anonymity of its users which immediately makes it attractive to anyone keen to stay in the shadows. Photo: Bloomberg

Beware nerds bearing algorithms. Virtual (or digital) currencies are all the rage, with Bitcoin leading the pack. Nobody seems to know who invented Bi(...)

Police officers inspect the police car that was damaged during the chase of a suspect on Capitol Hill in Washington yesterday. Photograph: Drew Angerer/The New York Times

A dramatic car chase through the streets of Washington from near the White House to the US Capitol ended in gunfire last night when police shot and(...)

A makeshift memorial for victims today near the site of the Boston Marathon bombings at the intersection of Boylston Street and Berkley Street. Photograph: Kevork Djansezian/Getty Images

US Republican lawmakers questioned today whether the FBI had fumbled the case of one of the two Boston Marathon bombing suspects, alleging it w(...)