When in Italy on 4 November one might be interested in the Armed Forces Day celebrations (Festa dell'Unità Nazionale e Giornata delle Forze Armate) with about 150 military installations open to the public, see http://www.difesa.it/4novembre/Programma/" onclick="window.open(this.href);return false; (including Decimomannu)
In addition on 8 November Piacenza-San Damiano AB will be open.
Jaap