6 AM ET: Holiday travel chaos, Costa Rica man hunt, Emmett Till discovery & more

We start with a warning about travel chaos heading into the holiday weekend, with one airline already cancelling flights. In Florida, a judge says he'll block a new state law banning abortion from 15 weeks. A woman has been arrested in Costa Rica after she was accused of killing an elite cyclist in the US - we'll tell you how US Marshalls tracked her down. Hong Kong is marking 25 years since the British gave the city back to China. Plus, a newly discovered arrest warrant has Emmett Till's family calling for justice. To learn more about how CNN protects listener privacy, visit cnn.com/privacy