How do museums balance security with easy access to art? “The Munch Museum had been at one extreme of the vulnerability spectrum. “The Scream,” for example, hung from an easily cut wire, like an ordinary painting in an ordinary home. The museum’s upgrades have moved it to the opposite extreme. With X-ray machines, bulletproof glass, metal detectors, and paintings bolted to the wall, the revamped museum has been dubbed Fortress Munch.”