FYI, the Nuclear Security Summit will be held Thursday, March 31st through Friday, April 1st in DC, with the DC Convention Center and the Marriott Marquis Hotel as the main venues. There will be many street closures and traffic restrictions. I know most of you bike commute, but for those of us who mostly get around by car, this is a giant pain and could make it very difficult to get to the happy hour that night. Just a heads up!