Horrible. And it’s not even the first time Russia’s pulled this crap:

Korean Air Lines Flight 007

Korean Air Lines Flight 007 (also known as KAL007 and KE007) was a scheduled Korean Air Lines flight from New York City to Seoul via Anchorage. On September 1, 1983, the airliner serving the flight was shot down by a Soviet Su-15 interceptor near Moneron Island, west of Sakhalin Island, in the East Sea. The interceptor’s pilot was Major Gennadi Osipovich. All 269 passengers and crew aboard were killed, including Lawrence McDonald, representative from Georgia in the United States House of Representatives. The aircraft was en route from Anchorage to Seoul when it flew through prohibited Soviet airspace around the time of a U.S. reconnaissance mission.