our correspondent, ekaterina fisenko, was among the spectators at the mariinsky concert hall.he music that is needed in grief. this sad concert began with a minute of silence. once upon a time, the composer was so touched by the death of rassine that he appeared. requiem. today , the whole country is touched by the terrible death of dozens of people. st. petersburg is also mourning. the mariinsky theater is changing its performance programs, and its posters have been changed. with this concert, the marinsky theater honors the memory of those killed in the terrible tragedy at crocus city hall and expresses its deepest condolences to the families and loved ones of the victims. at the controls of maestro valery gergiev is the stage choir of the mriinsky theater symphony orchestra, as well. the greatest voices of the country, ildar abdrazakov, ekaterina semenchuk, irina churilova, sergei skorokhodov. for everyone , the tragedy is a great shock. we go on stage, probably, to try to make this world a better, kinder and more beautiful place, and we try to do this every day, no matter