The FAA said inbound operations at New York’s JFK and LaGuardia airports have resumed, but communications issues persist; inbound flights to Philadelphia and Newark remain suspended.

On the 21st, three people said an agreement about to be signed by the US, Denmark and Greenland would see the US reactivate the Cold War–era base at Narsarsuaq in southern Greenland and establish a military presence at Mestersvig on the east coast. During the Cold War the US operated 17 facilities in Greenland and deployed more than 10,000 personnel; today it maintains only the Pituffik Space Base, with about 150 US troops.

Intel (INTC.O) extended gains to 13%, its largest intraday rise since July 30.