By the time U2 recorded their seventh album, 1991’s Achtung Baby, they were exhausted from nonstop touring, going through personal struggles at home in Ireland, and were at odds with each other about which direction to take musically. So, they headed to Berlin for a fresh start, landing on the day of the German Unification after the fall of the Berlin Wall. It was there that they wrote the song that put them all on the same page as a band again, the timeless “One,” a song about division that actually helped the band transition into a new decade. Get into the whole story in this episode of the Behind The Song podcast. Learn more about your ad choices. Visit megaphone.fm/adchoices