DC plane crash live updates: Investigators comb through wreckage for clues

Bob and Lori Schrock -- farmers from the small town of Kiowa, Kansas -- died last week in the midair collision near Ronald Reagan Washington National Airport, family friends confirmed to ABC News.

The founders of Premium Grain, Inc., the couple pioneered a method of rotating winter wheat with canola to improve the health of farmland.

"The goal on the farm is to produce crops that can tell a story, where they came from and what makes the journey unique," a quote from Bob Schrock on the company’s website reads.

They were traveling to Pennsylvania to visit their daughter in college, multiple local outlets reported.

A memorial and funeral for the couple is scheduled for this weekend.

-ABC News' Peter Charalambous

The National Transportation Safety Board released drone video filmed Thursday showing an overhead view of the downed American Airlines plane and Army Black Hawk helicopter submerged in the icy Potomac River.

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Drone video shows plane, helicopter submerged in PotomacDrone video filmed by the National Transportation Safety Board on Jan. 30 shows an overhead view of the downed American Airlines plane and Army Black Hawk helicopter.

ABCNews.com

Crews on Monday removed one of two plane engines and the plane fuselage from the water, and have started removing a wing, an Army official said.

They hope to finish recovery of the plane over the next 24 hours, the official said.

Crews plan to recover the cockpit on Tuesday, but winds may impact their work, the official said.

Fifty-five sets of remains have been positively identified, D.C. Fire and EMS Assistant Chief Gary Steen said.

Some human remains were found during Monday’s operations; these and previously recovered remains are in the process of being positively identified, Steen said.

Officials believe more remains are within the wreckage, Steen said.

Two Metropolitan Washington Airports Authority employees were arrested in connection with a leaked CNN exclusive surveillance video showing the plane and helicopter collision.

The employees were charged with computer trespass for allegedly making an unauthorized copy of Airports Authority records.

-ABC News’ Sam Sweeney