BOSTON (AP) — The intensifying legal tussle over whether a struggling Massachusetts museum should be allowed to auction 40 works of art, including two by Norman Rockwell, has raised questions about when — if ever — it's appropriate to unload the collection. A look at the arguments for and against, and why the case against the Berkshire Museum has aroused such anger: ___ WHY IS THE MUSEUM SELLING THE ART? In simple terms, the Pittsfield museum says it needs to sell the art for its very survival. The museum, founded in 1903, says it has been running an operating deficit that in the past 10 years has averaged more than $1 million annually, and will close within eight years without an infusion of cash.Read more on NewsOK.com