Washington luminaries, former presidents and the family of John McCain gathered at Washington National Cathedral to honor and remember the late senator in a grand display of pomp and unity in the nation's capital. CNN's Jeff Zeleny reports.

CNN's Lisa Ling spent the weekend with the Southern Arizona Militia, a right-leaning group focused on securing the southern border. "This is Life" airs Sunday at 10pm ET/PT.

Self-described militia groups have been ramping up in the US and taking increasingly public, dangerous and disturbing action. In Sundays "This is Life," Lisa Ling unpacks the origins of these groups.

Santa Fe County Sheriff Adan Mendoza said that a live round was fired from the gun shot by Alec Baldwin and that they suspect there were other live rounds that were found on the "Rust" movie set. CNN's Josh Campbell reports.