 And it's probably working now because more advanced brain scans can pick up the disease earlier so the drug can be given much sooner. The main safety issue was brain swelling and bleeding, a problem common to all plaque-targeting Alzheimer's drugs. Coming up, one in ten of these U.S. restaurants is in D.C. I'm Jeff Claybaugh. Plus, why a famous rock band is canceling dozens of tour dates. 535.