What is the first track on the AC/DC album "Back in Black"?

After years of grinding it out and building a rabid fanbase, AC/DC finally hit it big with "Highway to Hell," but tragedy struck when vocalist Bon Scott died in February 1980. It left fans wondering if the Australian rock legends would call it quits. Instead, they recruited Brian Johnson and headed to the Bahamas to record what would become one of the best-selling albums in rock history. What track kicks off their triumphant comeback album "Back in Black"?