The spread of the disruption to train services and the presence of senior officials in the White House.
At the same time as the aviation crisis, Fox News reported that Amtrak, the main operator of the American passenger train network, reported problems with its website and app. It is still not clear what the connection of this disruption is to the aviation systems crisis.
CNN also reported, citing an informed source, that US Secretary of War Pete Guest was present in the White House operations room as administration officials dealt with the aviation crisis.