A mysterious whistleblower complaint about President Trump apparently involves Ukraine. CBS News confirms an official from the intelligence community was so alarmed by the president’s recent conversations with Ukraine’s newly elected leader, they filed a formal report with the inspector general. CBS News chief congressional correspondent Nancy Cordes reports from Capitol Hill. Former FBI agent and special assistant to James Comey, Josh Campbell, joins CBSN on set to discuss the fallout as well as his new book, “Crossfire Hurricane: Donald Trump’s War on the FBI.” Source

The president commented on a whistleblower complaint that CBS News has confirmed involves the president’s communication with a foreign leader Source

In this preview of a “CBS Sunday Morning” interview to be broadcast September 22, the creator of the internationally-popular TV series “Downton Abbey,” Julian Fellowes, talks with correspondent Elizabeth Palmer about bringing the cast back together for a new theatrical feature. Source

In this preview of an interview for “CBS Sunday Morning” to be broadcast September 22, correspondent Tracy Smith asks the legendary film composer John Williams (“Jaws,” “Star Wars,” “Superman,” “Schindler’s List”) about his body of work. Source

The composer of film scores for such blockbusters as “Star Wars,” “Superman” and “Schindler’s List” tells “Sunday Morning” he finds no comfort re-listening to his work in the final product Source

De Blasio had been struggling in polling over the course of the race thus far Source

Hundreds of outsiders are descending on the remote Nevada desert near the military’s mysterious “Area 51” base. They are there for the so-called “Storm Area 51” event. What began as a joke on Facebook for people curious about the site and aliens has turned into a music, movie and space-themed entertainment festival. Decades of secrecy surrounding “Area 51” has fueled speculation that it’s where the government studies aliens that have visited earth. Source

Call to “storm” the secretive U.S. military base in the Nevada desert known as Area 51 attracted several dozen revelers to entrance Source

Cedric the Entertainer has been making audiences laugh for more than three decades. He currently stars as Calvin Butler on the CBS series “The Neighborhood.” It explores what happens when a white family from the Midwest moves next door to a black family in Los Angeles. Cedric joins “CBS This Morning” to discuss what’s in store for Season 2. Source

Scientists have a stark new warning about the disappearance of billions of birds in the U.S. and Canada according to a study just published in the journal, Science. It says more than a quarter of the entire bird population disappeared over the last half-century. Jonathan Vigliotti reports. Source