MusicU2 play concert on Berlin U-BahnTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoMusic12/07/2017December 7, 2017U2’s frontman Bono and guitarist The Edge been in the Berlin, treating fans on the city’s subway system to an impromptu mini-concert. The musicians were promoting their first album in three years. https://p.dw.com/p/2ouJKAdvertisement