When President Zelensky asked U2 to perform in Ukraine I'm sure he realized their choice for venue was limited. No worries, Bono and The Edge found a bomb shelter to perform in. The two did a 40 minute acoustic set which included a Ukrainian singer dressed in fatigues who sang a song with the duo and asked the world to come to their aid. U2 has always been a big supporter of Amnesty International but not just monetarily. This band walks the walk. I'm sure the people hunkered down in that bomb shelter, which used to be a subway will never forget it. https://ultimateclassicrock.com/bono-edge-u2-ukraine/