Senior Republicans are open to considering legislation banning "bump stocks" like the gunman in Las Vegas apparently used to effectively convert semi-automatic rifles into fully automated weapons.

The FBI is investigating more than 500 cases of corporate fraud amid the financial meltdown, it revealed today.

FBI agents have documented more than two dozen incidents of possible mistreatment at the Guantanamo Bay military base, including a detainee whose head was wrapped in duct tape for chanting verses from the Koran.