Police boats combed the banks of the Potomac River on Friday morning, moving slowly and scanning the shoreline as part of the investigation into the midair collision that killed 67 people in the United States' deadliest aviation disaster in almost a quarter century. More than 40 bodies have been pulled from the river as the massive recovery effort continued, two law enforcement officials told The Associated Press on Friday. The officials were not authorized to discuss details of the investigation and spoke on condition of anonymity. Crews worked under overcast skies Friday morning with rain expected throughout the day. Planes continued to take off and land at Reagan National, with airport operations gradually returning to normal after a slew of canceled and delayed flights following the crash. MORE: https://www.wtsp.com/article/news/nation-world/midair-collision-kills-67-people-deadliest-us-air-disaster-in-decades/507-3e711c59-52a5-4337-b3f4-be317368d9e8