Wives and relatives of captured Ukrainian servicemen from the Azov regiment attend a march called "We are waiting for the heroes of Mariupol" at Kyiv's Independence Square to mark the first anniversary of the fall of Mariupol to Russian troops. Russia captured more than 2,000 fighters in the siege of the port city's Azovstal steel plant, and advocacy groups say only about 500 of them have since been freed in exchanges. "It has been a year of pain," says Andrei Yusov from the Directorate General of Intelligence. IMAGES AND SOUNDBITES