Good evening. I'm Jeff Bennett. And I'm Amna Nawaz on the news hour tonight. Officials stop most helicopters from flying near Washington's national airport while they search for clues into what caused the deadly collision with a passenger jet.

A United Nations Relief Agency vows to keep providing aid to Gaza, despite an Israeli ban

on the organization taking effect.

And Syria faces the daunting task of rebuilding after 13 years of civil war, how one revolutionary

envisions his nation's future.

I feel that I am a human being again.

I am free again.

All of us believe that we were born just now.

Welcome to the News Hour. The black box from the Army helicopter that collided with a passenger

jet near Washington's Reagan National Airport this week has been recovered.

Investigators hope to gather valuable data as they try to understand what led to the deadly

mid-air crash.

As John Yang reports, families were also briefed today by officials and met with the medical

examiner.

Police boats were back on the Potomac River today as divers searched for the remaining

bodies of the 67 people who died in the mid-air collision

of a passenger jet and an army helicopter. Both aircraft still submerged in the icy waters.

And today, the first major change since the crash. The FAA shut down most low-altitude helicopter

flights near the busy Washington-Ragan National

Airport, one of the nation's most congested air spaces, shared until now, by commercial

jets and government helicopters.

Meanwhile, NTSB investigators began analyzing the passenger jets' cockpit voice and flight

...