Dec. 2008-Present	June 2006-Present	Jan. 2012-Present	May 2010-Present
June 2006-Dec. 2011	Feb. 2008-Feb. 2011	Sept. 2006-June 2010	Feb. 2008-June 2010
Sept. 2007-Nov. 2008	June 2006-April 2007	June 2006-Oct. 2006