On March 1, President Biden announced the closure of US airspace to all Russian flights.  According to the US Department of Transportation (USDOT), the restrictions are scheduled to be fully effective by the end of today, March 2, 2022.  The restrictions will be implemented in two ways.  First, the Federal Aviation Administration will issue a Notice to Airmen (NOTAM) that will prohibit Russian airlines and operators from using US airspace.  As of the publication of…