After joint air policing with Spanish Eurofighters began in mid-February, 4 Dutch F35s arrived in early April to replace the Spanish EF-2000. For about two months, F35s together with Bulgarian MiG29s were on 24hours duty of air policing mission. On May 6 – the day of the Bulgarian army, the guests took part in a joint demonstration over Graf Ignatievo, which was extremely exotic – aircraft from different eras flying together.
