Teams in Washington, DC, are tackling a tough double mission following the deadliest aviation accident in decades. They’re pulling wreckage from the Potomac River while also searching for victims trapped in the remains of two aircraft that collided and plunged into the icy waters.

So far, 55 of the 67 victims have been identified. Recovery teams are hoping to retrieve the cockpit of an American Airlines plane by Tuesday, weather permitting. Meanwhile, investigators are analyzing data from the black box of a military helicopter involved in the crash. However, key questions about what caused the collision may take weeks—or even months—to answer.

Dive teams are facing harsh winter conditions as they work to recover bodies and debris. The mangled wreckage has made the process slow and challenging, with divers relying on hydraulic tools to cut through metal and access trapped remains. Salvage crews are also using cranes to lift larger pieces of the planes, including an engine and part of the fuselage, onto barges.

The National Transportation Safety Board (NTSB) is focusing on both aircraft. Initial findings from the airplane’s flight data recorder reveal its nose pitched upward just before impact. Investigators are also examining whether the helicopter exceeded its 200-foot altitude limit.

Weather is adding another layer of difficulty, with snow, sleet, and freezing rain expected to hit the area. Despite the challenges, experts remain confident the investigation will eventually uncover the cause of the disaster.

As the recovery continues, the focus remains on the victims and their families. “It’s been the saddest day I’ve ever seen on the river,” said Dean Naujoks, who helped search for debris. “My heart goes out to everyone affected.”

A preliminary report from the NTSB is expected in about a month, shedding more light on this heartbreaking incident.