Jethro Tull frontman Ian Anderson has revealed that he’s battling an “incurable” lung condition. The 72-year-old flutist revealed that he’s been battling chronic obstructive pulmonary disease (COPD) for at least “a couple of years.” “I’m going to tell you something I’ve never told anybody in public before,” said Anderson, when asked how he’s able to jump around onstage, sing and play flute at the same time at his age — as heard in a snippet of a soon-to-be broadcast episode of Dan Rather‘s The Big Interview, obtained by Rolling Stone. “Since it’s you,” he added, referring to Rather, 88, “I will take this moment to say I am suffering from an incurable lung disease with which I was diagnosed a couple of years back.” COPD is a progressive,