SOURCE: RTT Music News Responding to an invitation from Ukrainian President Volodymyr Zelenskyy, U2 frontman Bono and lead guitarist The Edge performed at a subway station in Kyiv that serves as a bomb shelter on Sunday, in a show of solidarity with Ukrainians fighting the Russian invasion. "President Zelensky invited us to perform in Kyiv as a show of solidarity with the Ukrainian people and so that's what we've come to do," Bono tweeted, adding the hashtag #StandWithUk