Original sentence: Atlanta History Center.Atlanta, GA.Chicago, IL.Durham Western Heritage Museum.February 12 - May 9, 2009.February 22–April 22, 2010.Indiana State Museum.Indianapolis, IN.January 8, 2011–March 5, 2011.June 22–August 22, 2009.Library of Congress.Newberry Library.October 10–December 19, 2009.Omaha, NE.Sacramento, CA.September 4–November 6, 2010.The California Museum.Washington, DC
Edited sentence: February 12 - May 9, 2009:  Library of Congress, Washington, DC.February 22–April 22, 2010:  Indiana State Museum, Indianapolis, IN.January 8, 2011–March 5, 2011:  Durham Western Heritage Museum, Omaha, NE.June 22–August 22, 2009:  The California Museum, Sacramento, CA.October 10–December 19, 2009:  Newberry Library, Chicago, IL.September 4–November 6, 2010:  Atlanta History Center, Atlanta, GA.The ALBC has endorsed 224 events and programs.The full list can be found here