 Henry, thank you. Heavy rains across the Midwest this week caused rivers to rise and severely damaged a dam in Minnesota, about an hour and a half southwest of Minneapolis. The dam opened in 1910 when William Howard Taft was president and was known to be in need of an overhaul. There are thousands of aging dams in this country. The American Society of Civil Engineers gives dams a D grade. Marketplace's Daniel Ackerman has more.