Rob Reiner, the award-winning director behind "The Princess Bride," "When Harry Met Sally," "A Few Good Men" and more, helped shape cinema with stories full of heart and humor. David Muir looks back at Reiner's life and the lasting legacy he leaves behind. https://abcnews.link/kHoK73k | ABC World News Tonight with David Muir

Room for one more? China's Zhonghua and Tagou Martial Arts Schools go head to head, skillfully squeezing onto a platform in this oddly satisfying display of terrific teamwork. | Guinness World Records

Who will win the walnut cracking head-to-head? S.Navin Kumar (India) vs Muhammad Rashid Naseem (Pakistan) | Guinness World Records

These pups are so proud of their popping power 🎈🐶 | Guinness World Records

A pair of gunmen, a father and son, opened fire on a crowd celebrating the first night of Hanukkah at Australia's famed Bondi Beach. At least 15 people were killed and 42 more wounded. Marcus Moore has the latest. | ABC World News Tonight with David Muir

A massive winter storm slamming the east coast has caused treacherous travel conditions and major flight disruptions at airports across the northeast. Up to eight inches of snow falling in parts of Pennsylvania, New York and New Jersey. Andrew Dymburt reports. | ABC World News Tonight with David Muir

A person of interest has been detained after a shooting at Brown University left two students dead and 9 injured. Whit Johnson speaks to a teaching assistant who recalls the gunman opening fire during his study session. | ABC World News Tonight with David Muir