His friend's work is connected with Zaporozhye airport. Here is his quote:
Now at the airport they are performing an urgent order for the installation of defensive towers along the perimeter of the airport. He said that the work needs to be completed ASAP, since the order is urgent. Started in late November. Now almost complete. Yesterday reported that flights from Zaporozhye (Motor Sich) will stop on the 13th. And this is despite the wishes of Motor Sich to fly to Moscow daily from December 16, instead of three times a week.In Dnepropetrovsk - a similar situation, from Kharkov there was no confirmation. In general, apparently the US does not want to wait until the Act on military assistance to Ukraine adopted by the senate will pass through congress and are boosting rearmament of junta troops. New unofficial military advisers/assistants should be expected to show up as well.
To the question, why stop, one of the airport workers replied that the airport has to be prepared to accept military aircraft with equipment, including Kharkov and Dnepropetrovsk. The equipment is expected from the United States.