U2 rock band frontman Bono and Ukrainian serviceman, frontman of the Antytila band Taras Topolia sing during a performance for Ukrainian people inside a subway station, as Russia's attack on Ukraine continues, in Kyiv, Ukraine May 8, 2022. Irish rock group U2's frontman Bono and his bandmate The Edge performed a 40-minute concert in a metro station in the Ukrainian capital of Kyiv on Sunday and praised Ukrainians fighting for their freedom from Russia. REUTERS/Valentyn Ogirenko

U2 rock band frontman Bono and Ukrainian serviceman, frontman of the Antytila band Taras Topolia sing during a performance for Ukrainian people inside a subway station, as Russia's attack on Ukraine continues, in Kyiv, Ukraine May 8, 2022. "Your president leads the world in the cause of freedom right now ... The people of Ukraine are not just fighting for your own freedom, you're fighting for all of us who love freedom," Bono told a crowd. REUTERS/Valentyn Ogirenko

U2 rock band frontman Bono sings during a performance for Ukrainian people inside a subway station, as Russia's attack on Ukraine continues, in Kyiv, Ukraine May 8, 2022. REUTERS/Valentyn Ogirenko

U2 rock band frontman Bono sings during a performance for Ukrainian people inside a subway station, as Russia's attack on Ukraine continues, in Kyiv, Ukraine May 8, 2022. REUTERS/Valentyn Ogirenko

U2 rock band frontman Bono sings during a performance for Ukrainian people inside a subway station, as Russia's attack on Ukraine continues, in Kyiv, Ukraine May 8, 2022. REUTERS/Valentyn Ogirenko

Bono, The Edge and Ukrainian serviceman, frontman of the Antytila band Taras Topolia sing during a performance for Ukrainian people inside a subway station, as Russia's attack on Ukraine continues, in Kyiv, Ukraine May 8, 2022. REUTERS/Valentyn Ogirenko