A security officer stands by the mini-va

A security officer stands by the mini-van used by attackers at entrance to the Microsoft office in an Athens northern suburb on June 27, 2012. Attackers targeted the Microsoft main office in the Greek capital in a pre-dawn arson attack Wednesday, smashing the entrance with a mini-van and setting off gas canisters, police said.Anti-terrorist police were investigating, and authorities did not rule out an extremist group was behind the attack, which caused no casualties. AFP PHOTO / LOUISA GOULIAMAKI (Photo credit should read LOUISA GOULIAMAKI/AFP/GettyImages)