WASHINGTON (NEXSTAR) — Recovery efforts are underway after a deadly plane crash near Reagan National Airport last week killed 67 people. 

Monday, crews began lifting the wreckage from the Potomac River.

“Today was a very successful day, for the most part,” US Army Corps of Engineers Colonel Francis Pera said during a news conference Monday afternoon. 

Pera says authorities recovered parts of the American Airlines jet that collided with an Army helicopter Wednesday and left 67 people dead. 

“Those were our goals for today: the fuselage, the engine and the wing,” Pera said. 

Pera says the operations Tuesday will focus on the cockpit. 

The number of victims identified is still 55, according to D.C. Fire Assistant Chief Gary Steen. He says they recovered more remains Monday. 

“These remains, as well as remains that have been recovered previously, are in the process of being positively identified,” Steen said. 

Steen says he believes the remaining victims are in the wreckage.

The recovery operations come after families of the victims visited the crash site Sunday near Reagan National Airport. 

The National Transportation Safety Board is leading the investigation into what caused the collision. 

Some of the questions deal with how high the helicopter was flying. Army Colonel Mark Ott says to let the investigation play out. 

“It’s important for us to not speculate,” Ott said. 

Transportation Secretary Sean Duffy told Fox News Sunday it’s still safe to fly. 

“We have the safest skies in the whole world,” Duffy said. 

Duffy said on X he plans to visit the site Monday.