By the time U2 set out to record The Joshua Tree in 1986, the band had already established itself as one of rock’s premier hit machines. There was no denying that U2 was at the top of their game, but they were also at a personal and musical crossroads. The result was a roots-rock influenced album that went platinum within two days and landed U2 on the cover of Time magazine—and an Album of the Year Grammy Award. Read on to learn the back story of one of modern music’s most famous records.