From Publishers Lunch:
Portions of Scottish airspace continue to open, though even with the newly-established flying zones London's airports remain closed until at least 6 PM London time today. (Limited trans-Atlantic flights have resumed at other continental airports in such cities as Paris and Amsterdam.) The US Ambassador in London told the White House he estimates that approximately 40,000 Americans are stranded in Britain. When White House spokesman Robert Gibbs was asked if the US would follow the example of the UK's Royal Navy and try to bring citizens home by boat, he replied, "We've got some big ships, but that would be a pretty big ship."
You said it, Admiral. :-)