The musician and philanthropist will donate proceeds from his new song, composed for the documentary “To Be of Service,” to the Patriotic Service Dog Foundation Source

According to the Navy​, the USS Grayback was one of the most successful submarines in the war, sinking a total of 14 ships Source

The solar system’s smallest, innermost planet will resemble a tiny black dot Monday as it passes directly between Earth and the sun Source

Blood evidence in the car belonging to UFC heavyweight Walt Harris’ missing stepdaughter shows she suffered “a life-threatening injury,” police records show Source

Sea lions who have been hurt in the wild are helping veterans deal with post-traumatic stress disorder. Up to 20 percent of veterans returning from recent tours overseas have PTSD, according to the Department of Veterans Affairs. Carter Evans reports. Source

A look back at what we’ve been covering on “CBS This Morning.” Source

An estimated 25 million American adults used dating apps in the past year. Some experts say dating apps keep people locked in an endless cycle of matches and rejections, and many end up feeling more disconnected and lonely. CBSN Originals executive producer Adam Yamaguchi joins “CBS This Morning” to discuss their new documentary, “Dating Apps.” Source

One of Apple’s co-founders, Steve Wozniak, is accusing the company’s new digital credit card of gender discrimination. Apple introduced the card in August, partnering with Goldman Sachs as the issuing bank. Last week one tech entrepreneur said the algorithms being used are sexist. CBS News contributor and Wired editor-in-chief Nick Thompson joins “CBS This Morning” to discuss the claims. Source

You may love that picture from your friend on Instagram, but soon you may not know if anyone else “likes” it. Instagram has been testing hiding “likes” in several countries, and starting this week the company will expand the test to parts of the U.S. The announcement has been getting its share of “dislikes.” Jonathan Vigliotti reports. Source

The impeachment inquiry into President Trump enters a dramatic new phase this week with the first public hearings. Major Garrett takes a look at what led to the resignation of President Nixon in 1974 over the Watergate scandal. He was accused of abusing his office, the same as President Trump. Source