CNN has learned that a letter addressed to the New York City Mayor Michael Bloomberg contained material that tested positive in preliminary tests for the deadly poison - ricin.
A second letter also tested positive for the substance that was sent to an office in Washington DC that houses "Mayors against Illegal Guns," an organization Bloomberg helps run.
OutFront tonight: CNN's National Security Analyst Fran Townsend and Dr. Ian Lipkin – an epidemiologist and the medical mind behind the movie "Contagion."
In China, where a newborn baby was found alive inside a sewer pipe after apparently being flushed down a toilet.
On their official social media account, authorities say they've found the mother who tells them she "regrets" what she did.
The baby is now recovering in a local hospital.
CNN's Hala Gorani is OutFront with the amazing story of the baby's rescue.