Back in 2013, we reported that two Russian Tu-22M3 bombers practiced making an attack on Sweden on Mar. 29 that year, NATO’s latest annual report said the bombers were on a mock nuclear attack run at that time of the incident.
By Alex Beltyukov (http://russianplanes.net/EN/ID56447) [CC BY-SA 3.0, CC BY-SA 3.0 or GFDL 1.2], via Wikimedia Commons
The simulated attack brought the bombers and its four Su-27 escorts over Gotska Sandön, an uninhabited Swedish island in the Baltic Sea, and the Swedish Air Force was caught off guard that day. Only two F-16s from Denmark, which were deployed for the NATO Baltic Air Policing mission, were airborne at that time to shadow the strike package.