A hatchet-wielding attacker charged a group of New York City police officers posing for a photograph on Thursday, wounded two, one critically, before the assailant was shot dead, police said.
U.S. officials are debating whether to tighten controls on the border with Canada and make it easier to revoke the passports of suspected militants, steps that could gain traction following two attacks in Canada this week.
The Canadian government determined to return to business as usual on Thursday after a reported convert to Islam shot dead a soldier at the National War Memorial and rampaged through Parliament before being killed himself.
A gunman attacked Canada's parliament on Wednesday, with gunfire erupting near where Prime Minister Stephen Harper was speaking, and a soldier was fatally shot at a nearby war memorial, stunning the Canadian capital.
