A jet with 60 passengers and four crew members collided with an Army helicopter Wednesday while approaching the Ronald Reagan National Airport near Washington. The aircraft plummeted into the Potomac River. Everyone onboard was feared dead, officials said Thursday. Metropolitan Washington Airports Authority CEO Jack Porter briefed reporters that the airport is expected to open at 1100 Eastern. (1600 GMT) During a news conference, Transportation Secretary Sean Duffy was asked about President Donald Trump suggesting in an overnight social media post that the collision could have been prevented. “Do I think this was preventable? Absolutely," Duffy said. "We have early indicators of what happened here and I will tell you with complete confidence we have the safest airspace in the world,” he added. Duffy said that, prior to the collision, the plane and helicopter flight paths “were not unusual for what happens in the DC airspace”