Dallas; Charles Blow; John Micklethwait; Juno

Manny Fernandez reports from Dallas on the aftermath of shootings there. A discussion of race and violence with columnist Charles Blow. An update on British politics with John Micklethwait, editor-in-chief of Bloomberg. Jeff Glor hosts a discussion of the Juno spacecraft with Darrick Pitts of the Franklin Institute, Lauren Grush of The Verge, and Miriam Kramer of Mashable.