What AC/DC Song Features Bagpipes?

It’s A Long Way To The Top (If You Wanna Rock ‘N’ Roll) (YouTube video) from their debut album High Voltage. I noticed it for the first time a couple days ago. AC/DC is being played a lot on radio stations here: they’re coming to Moncton on August 6, 2009, as previously reported by your favorite entertainment website, Steel White Table.