A sign at the entrance to the headquarters of bankrupt Solyndra LLC is shown in Fremont

 
A sign at the entrance to the headquarters of bankrupt Solyndra LLC is shown in Fremont
A sign at the entrance to the headquarters of bankrupt Solyndra LLC is shown in Fremont, California September 20, 2011. Solyndra LLC's chief executive and chief financial officer will invoke their Fifth Amendment rights and decline to answer any questions put to them at a Congressional hearing on Friday, according to letters from their attorneys obtained by Reuters. REUTERS/Robert Galbraith (UNITED STATES - Tags: SCIENCE TECHNOLOGY BUSINESS)