The Portuguese Air Force carries out an exercise called Real Thaw 2010 from the 25th of January up-to the 4th of February. Operations are run from the 5th Air Force Base, in Monte Real, Leira. Beja Airbase BA11 also joins in on Real Thaw 2010.
About a thousand military personnel and 50 aircraft from the Portuguese Air Force (FAP) and their counterparts from Belgium, Spain, Denmark and the U.S. take part in the operations.
Read about it at http://www.correioalentejo.com in the article "BA 11 entra no exercício "Real Thaw 2010"".