Democrats are working to advance gun bills in Congress in an effort to pressure Republicans and the White House in the wake of several deadly mass shootings. The country’s largest and best known gun rights association, the NRA, is losing board members. But another, lesser-known gun organization, is thriving. Omar Villafranca reports. Source

A government source tells CBS News the maker of OxyContin could file for bankruptcy as early as Wednesday. Purdue Pharma and its owners, members of the Sackler family, have been negotiating a potential settlement for months over Purdue’s alleged role in fueling the nationwide opioid epidemic. Mola Lenghi reports. Source

Curtis Whitson and his family were days into a scenic, Father’s Day weekend trip in Pfeiffer Big Sur State Park back in June when they got trapped at the top of a 40-foot waterfall in the Arroyo Seco Canyon. Now, we’re learning new details about how Whitson, his girlfriend and 13-year-old daughter were miraculously rescued. Michelle Miller reports. Source

Analysts see room for an easing of tension between Washington and Tehran, but don’t expect any sudden breakthroughs Source

Decision to suspend legislative body was motivated by the “improper purpose of stymying Parliament,” the court says Source

In this episode of “Intelligence Matters,” host Michael Morell speaks with journalist and author Garrett Graff about his new book, “The Only Plane in the Sky: An Oral History of 9/11” Source

No early word on how many on board or their condition but plane, apparently carrying auto parts, was “fully engulfed” Source

Damages structures, downs trees and street lights, leaves tens of thousands without power Source

On Wednesday, the 9/11 Memorial and Museum holds a ceremony to remember the lives lost Source

Pyongyang says Kim Jong Un watched latest in series of weapons tests, hours after North said it was willing to resume nuclear talks with U.S. in late September Source