Today in History: August 9, U.S. bombs Nagasaki

On August 9, 1945, a U.S. B-29 Superfortress dropped an atomic device over Nagasaki. Other historical milestones include the start of construction on Pisa Cathedral in 1173 and the publication of Henry David Thoreau’s "Walden" in 1854. More recently, Michael Brown Jr.’s death in Ferguson, Missouri, sparked protests that helped fuel the national “Black Lives Matter” movement.