USA Mount Rainier National Park closed; manhunt on for gunman who killed ranger

A massive manhunt is under way Monday in Mount Rainier National Park in Washington, as authorities track a gunman wanted for killing a park ranger on New Year's Day.

Ted S. Warren/AP

A massive manhunt is under way in snow-covered Mount Rainier National Park as an estimated 150 officers from a variety of police agencies seek a gunman who shot and killed park ranger Margaret Anderson Sunday morning.