Likely airspace shutdown comes two weeks before Thanksgiving holiday, typically the busiest travel period of the yearUS politics live – latest updatesUS airline regulators are expected to publish a list of 40 airports serving “high-volume markets” where air traffic will be reduced on Friday, a move that could would force airlines to cancel thousands of flights and create a cascade of scheduling issues and delays at some of nation’s largest airports.The Federal Administration Agency has said flights are being reduced to maintain safety during the ongoing federal government shutdown, now the longest recorded and with no sign of a resolution