The Brief The FAA is investigating a "loss of separation incident" with Marine One, the president’s military helicopter, while President Trump was on board Tuesday. When Marine One took off Tuesday afternoon, air-traffic controllers reportedly failed to stop commercial flights at nearby Ronald Reagan Washington National Airport. The Federal Aviation Administration is investigating an incident involving Marine One, the president’s military helicopter, while it was carrying President Donald Trump, Reuters reports. Marine One safety incidentWhat we know:When Marine One took off Tuesday afternoon, air-traffic controllers reportedly failed to stop commercial flights at nearby Ronald Reagan Washington National Airport. What they're saying:"The FAA is investigating a safety incident involving Marine One but it didn’t appear to be a dangerous close call and the aircraft weren’t apparently converging," the FAA said in a statement.