Tags: Al Qaeda

World leaders including Muslim and Jewish statesmen linked arms to lead an estimated million-plus French citizens through Paris in an unprecedented march under high security to pay tribute to victims of Islamist militant attacks.

Two protesters were arrested at the McLean, Virginia, home of former Vice President Dick Cheney on Saturday after 20 demonstrators, some in orange prison jumpsuits, walked onto his property to mark the 13th anniversary of the opening of Guantanamo Bay prison.

This week's deadly attacks in France by Islamist gunmen showed the limits of spy and anti-terrorist agencies, which often have information about perpetrators in advance but are only able to assemble all the clues after the bloodletting has taken place.