A Marine One or Two (one = carrying the President, two = carrying vice president) flying over DC. Of course other prominent individuals (i.e. White House cabinet and staff) are able to board the VH-3D too. The white top is one of eleven in service and was pictured over the Potomac River. The VH-3D entered service in 1978 and is expected to be replaced by the VH-92A from 2023.