All 67 people on board the plane and the helicopter were killed in the crash.
Hundreds of families are in mourning after an American Airlines regional jet collided with a U.S. Army Black Hawk helicopter on Jan. 29, with both aircraft plunging into the Potomac River near Ronald Reagan Washington National Airport in Washington, D.C.
No one survived.
Sixty-four people were on board the plane, which departed from Wichita, Kansas. Three soldiers were on the helicopter.
All major parts of the American Airlines regional jet and Black Hawk helicopter have been removed from the Potomac River after last week's crash, the U.S. Army Corps of Engineers announced Thursday.
Salvage crews will continue to work on clearing smaller debris from the river.
The crews began removing the wreckage from the Jan. 29 crash on Monday.
The pilots of the U.S. Army Black Hawk helicopter that collided with the regional American Airlines jet last week, were believed to be wearing night vision goggles at the time of the crash, an official said.
“We do believe, given the mission and given what we’ve heard or not heard on the [cockpit voice recorder] that they were wearing night vision goggles,” National Transportation Safety Board Chair Jennifer Homendy said during a press gaggle Thursday.
She said that's according to NTSB's preliminary information.
Homendy also said the NTSB did not know for sure that the Automatic Dependent Surveillance-Broadcast (ADS-B) tracking system was installed on the helicopter and the agency is awaiting further evaluation.
Earlier, Sen. Ted Cruz, of Texas, said lawmakers were briefed by the Federal Aviation Administration and told that the data from the ADS-B system in the helicopter was "turned off."
-ABC News' Ayesha Ali and Clara McMichael
Pieces of the downed Black Hawk helicopter were removed from the Potomac River on Thursday as the investigation into the cause of the crash continues.
The Federal Aviation Administration has notified airlines that it is "about to announce a slightly lower rate for" Reagan airport.
"Due to the two offload runways being closed, we are running a 28 arrival rate which is the maximum number in a peak operation for a single runway," the FAA said, according to an email obtained by ABC News.
This action is being taken as the FAA and National Transportation Safety Board investigators expressed concerns for the tower personnel on duty due to "an increased level of stress while also having a front row view of the accident recovery," the email said.
"We believe easing up on the gas a bit, and reducing from a 28 to a 26 rate, will reduce risk and allow a little space for extra coordination," the FAA said in the email.
-ABC News' Ayesha Ali
