MARSHALL — A series of speakers and reflections on the United States’ 250th anniversary will continue in July at the Lyon County Museum. Speaker, photographer and historian Doug Ohman will be presenting “America 250” July 29 at the museum. Museum director Jennifer Andries said Ohman will be talking about some of the success stories of America’s history. “It’s something he’s put together for the 250th anniversary,” Andries said. Ohmann has photographed historic architecture and landscapes in Minnesota for many years. He is also a historian and a public speaker, and ...