May 6, 2016

• After repeatedly saying he'd support the Republican nominee, Paul Ryan says he can't back Trump.
• Profile of Milwaukee Sheriff David Clarke, a black Fox News talking head and Trump's favorite lawman.
• Dispatch from a business-casual white supremacist conference.
• On the campaign trail with John McAfee.
• The stories of four toddlers who shot themselves during one week last month.
• A rogue Facebook employee is fighting the company's policy of shutting down illegal gun sales.
• Those who depend on social media engagement are finding the "like" is losing value.
• Study finds medical errors, if counted as a disease, would be the third leading cause of death in the US.
• Very early on, Purdue was aware of OxyContin addiction, which all but created the nation's opioid epidemic.
• Unsurprisingly, Philip Morris's claim that Marlboro Lights are less cancerous are public lies.
• Indigenous Canadians have been committing suicide at disproportionately high rates—there's no clear answer why.
• Martha's Vineyard Sign Language sprung from a propensity for inherited deafness on the island. Now it's vanishing.
• Striking photographs of the devastation caused by the Alberta wildfires.
• "This is one Derby phenomenon that is hard to appreciate on television: There are no children at Churchill Downs."
• Boaty McBoatface is no more, though one of RRS Sir David Attenborough's sub-sea vehicles will be named "Boaty."