New illicit street drug killing thousands; Investigative producer Leslie Marcus uncovers the deadly synthetic opioid market; Dr. Laura Berman recounts how her 16-year-old son died after taking pills allegedly laced with fentanyl; Parent Alert: Snapchat drug dangers! Should all drugs be legalized? Heated debate with Columbia psychology professor Dr. Carl Hart and anti-drug legalization activist Will Jones III; Tighter skin in under an hour with nurse practitioner Charmaine Arnaud; Clean bathroom hacks with Melissa Maker; Daily Power Prescription.