On March 29 the first stage of command-staff exercises "Frontier-2007" in the framework of Collective Security Treaty Organization (CSTO) will launch in Moscow. Armenia also participates in these exercises. Press Secretary of the RA Acting Defense Minister colonel Seyran Shahsuvaryan informed the PanARMENIAN.Net journalist that the exercises will be held April 3-6 in Tajikistan, and Armenia will be represented by three officers at the conference in Moscow.