The interior of a home in Clarksville, Tenn., damaged by a shake-and-bake meth lab explosion in December 2011 is seen here. (Associated Press/Tennessee Methamphetamine Task Force)

Photo by: Jesse Reynolds

The interior of a home in Clarksville, Tenn., damaged by a shake-and-bake meth lab explosion in December 2011 is seen here. (Associated Press/Tennessee Methamphetamine Task Force)