Last week, Jack White reentered our brains by announcing the solo album Blunderbuss and giving us the superlatively stripped-back new song "Love Interruption." The "Love Interruption" single is out now, and it includes a non-album track called "Machine Gun Silhouette" as a B-side. It's a jumpy, bluesy yarn with touches of old-school country, and someone uploaded it to the Internet, ...