NEW YORK (AP) — Imagine Dragons are touring the U.S. this summer and fall, which means frontman Dan Reynolds has to go to a lot of dark places.The band is debuting songs from the second half of ‘Mercury,’ a double album of brooding and moody meditations on death and human frailty. Reynolds relives the pain at every show. ‘I don’t know how to perform without going to the place that I was when I wrote the song,’ he says. ‘When I get up on the stage, it’s ‘OK, the song is playing. Where was I? What was I feeling? Now let me emote that.