With 7.5 tons of steel salvaged from the Twin Towers forming her bow, USS New York is tribute to those who perished on 9/11; she was also built to launch up to 800 Marines and their fierce battle hardware ashore with speed and versatility.

RATED 14+. After a small commuter plane crashes moments after take-off, investigators comb through the wreckage and uncover a string of errors and faulty assumptions that have been putting millions of passengers at risk for years.

RATED 14+. While on a hiking trip in Zimbabwe's Chizarira National Park, elephants attack two friends, leaving one bleeding out while the other struggles to find safety; a 12-year-old encounters an alligator while swimming in a Louisiana pond.

The drilling rig Leiv Eirikkson faces the challenge of navigating one of the world's busiest shipping lanes and squeezing under two suspension bridges; 330 Squadron medivac a man with serious heart problems and his heart stops during the rescue.

RATED 14+. Bear and his team are in Norway; armed with the latest technology they create the harshest conditions possible while sensors monitor how Bear copes trying to survive in one of the world's most beautiful but wettest countries.