Summary: Saturday on PBS News Weekend, why some of the nation's top colleges and universities are opting out of a decades-old rankings list. Then, with infections on the rise, what you need to know about ticks and the spread of Lyme disease this summer. Plus, how anonymity on social media influences the way people act online, including harassment. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
