Substitution Reactions - SN1 and SN2 Mechanisms

Belly Conklin is about to turn 16, and she's headed to her favorite place in the world, Cousins Beach, to spend the summer with her family and the Fishers. Belly's grown up a lot over the past year, and she has a feeling that this summer is going to be different than all the summers before.

After landing her dream job in Paris, Chicago marketing exec Emily Cooper embraces her adventurous new life while juggling work, friends and romance.

Armed with National Geographic's trademark inside access, Trafficked with Mariana van Zeller takes viewers on a journey inside the most dangerous black markets on the planet. Each investigation in the eight-part series embeds with Peabody and duPont Award-winning journalist Mariana van Zeller as she explores the complex and often violent inner workings of a smuggling network. While she dives deeper and deeper into these underworlds, Mariana reveals - with characteristic boldness and empathy - that the people operating these trafficking rings are often a lot more like us than we realize.

In the first ever celebrity series of SAS: Who Dares Wins, 12 well-known faces embark on one of the toughest tests of their lives, to raise money for Stand Up To Cancer. They're living and surviving together in an unforgiving ex-military base, high in the Chilean Andes. From the recruits' very first challenge - a terrifying backwards dive out of a helicopter - Ant Middleton and his team of ex-special forces instructors are determined to show them that no allowances will be made for their celebrity status.

Dave Turin spent years working alongside Todd Hoffman and earned the nickname "Dozer Dave." Now, Dave is planning a spectacular return to gold mining, as he searches for a lost and abandoned mine to resurrect, and chase the gold the old-timers left behind.