Lockdown at the "Dancing With The Stars" studios. Mysterious white powder sent to Bristol Palin. Authorities name The Hoff as "person of interest". Mama Grizzly threatens castration. Still no cure for Levi Johnston.

http://www.tmz.com/2010/11/19/cbs-bristol-palin-hazardous-material-white-powder-substance-police-threat-sarah-palin-bristol-palin/