In a major blow to insurgents, the Syrian Army has retaken the vital highway between Aleppo and Damascus. The United Nations is medating prisoner exchange talks between the warring parties in Yemen. And former IRA-linked party Sinn Féin came in a surprise second in Irish elections. CBS News’ Gwen Baumgardner rounds up the headlines from London. Source

Siba the black standard poodle wins nonsporting group, Bono the Havanese wins toy group, Bourbon the whippet is named top hound, and Conrad the Shetland sheepdog wins herding. Source

Tweets by social media troll bots that target Democratic candidate Pete Buttigieg spiked following his success in the Iowa caucus. CNET senior producer Dan Patterson joined CBSN AM to break down the data behind the attack and why alleged troll bots target certain candidates. Source

The study, released by the Guttmacher Institute on Tuesday morning, highlights what some reproductive rights supporters say is a strategy to “regulate abortion out of existence.” Source

This marks the first time a mountain lion with a tracking collar has been killed under the state’s depredation law in the Santa Monica Mountains, according to the National Park Service. Source

Most of the victims of the accident were woman and children, fleeing the overcrowded refugee camps for Rohingya Muslims in Bangladesh. Source

The DOJ said there was no evidence the stolen information was being used, though according to electronic privacy expert Alan Butler, that might not be the case for long. Source

Joseph Shabalala is world-known for his leadership of the choral group founded in 1964 that shot to world acclaim, collaborating with Paul Simon on the “Graceland” album and others. Source

As voters head to the polls Tuesday, 2020 marks New Hampshire’s 100th anniversary of being the first-in-the-nation primary election. Ed O’Keefe is in the state to talk about the tradition’s significance, and why it could be at risk after a century. Source

The first-in-the-nation primary follows the disarray of the Iowa caucuses. Source