Former President George W. Bush will make a rare public appearance in Indianapolis next year to deliver the keynote speech at The Work Truck Show.Organizers say Mr. Bush will discuss the challenges facing the U.S., the power of freedom, the role of faith and other topics.The show is largely for industry professionals, including fleet managers, manufacturers, equipment buyers and maintenance personnel. Bush's speech at a breakfast meeting on March 7th is open only to attendees.Apart from a book tour, Mr. Bush has largely avoided the public eye since leaving office. His wife, former First Lady Laura Bush, told the Associated Press earlier this year that the former president had decided not to re-enter politics.Additional information from the Associated Press