Flowers are fixed at an entrance to Lubyankka subway station on Wednesday, March 31, 2010. The Moscow subway bombings shocked a country that had grown accustomed to such violence being confined to a restive southern corner such as Dagestan, and marked the return of terrorism to the everyday lives of Muscovites after a six-year break. Federal Security Service, former KGB headquarters seen at the background. (AP Photo/Alexander Zemlianichenko)