JUDY WOODRUFF: Now we continue our special series on Rethinking College with a look at graduate students who pay little or even nothing for a top 10 master's degree program. HARI SREENIVASAN: It's graduation day, and these two students are earning their computer science master's degree from a top 10 program in the country. But it's the first time they have ever visited campus. VANESSA ANDERSON, Graduate: This whole experience was very surreal. This is my first time on campus, being here.

HARI SREENIVASAN: The WikiLeaks release earlier this week showed the CIA could use hacking tools to break into cell phones, computers and Internet-connected televisions. We should say there is no evidence the CIA used this against Americans. But the revelations surprised many. It raises the concerns for the increasing number of Internet-connected devices all around us, and what they're monitoring and who has access to it. In fact, in a recent murder case, law enforcement is trying to gather recordings from an Amazon Echo in order to see if it might have picked up evidence surrounding the crime.

HARI SREENIVASAN: Now a new effort to shed light on a mystery that has long baffled scientists who study the world's oceans and waterways. Researchers are using some very sophisticated robots to understand what's happening with microscopic marine life. Special correspondent Cat Wise has the story, part of our weekly series covering the Leading Edge of science and technology. CAT WISE: At the Crab Cove Visitors Center in Alameda, California, the main attraction is, no surprise, crabs. CAT WISE: On a recent afternoon, a group of children on a field trip at the center headed outside to the nearby beach with naturalist Morgan Dill for a talk on the creatures of the cove.

GWEN IFILL: Now: The Jetsons future may be arriving sooner than you think, for better or for worse. Uber is experimenting with self-driving cars. In Pittsburgh today, the company began deploying a small test fleet of the vehicles around the city. HARI SREENIVASAN: OK, the first thing to know, Uber tried this with several journalists this week. Each self-driving car was accompanied by a human operator, who loosely kept hands on the steering wheel.

HARI SREENIVASAN: The man who led the Afghan Taliban for the past year was killed in a U.S. operation over the weekend. The group had been gaining ground and waging a bloody war against the Afghan government. So, what's next for the Taliban, and the countries who fight it? Chief foreign affairs correspondent Margaret Warner begins our coverage. MARGARET WARNER: Smoldering wreckage on a Pakistani roadside was all that remained of the Taliban commander's vehicle hours after he died in it Saturday.

GWEN IFILL: Now we continue our series about artificial intelligence, A.I., where computers are able to make intelligent decisions without human input. As computing power gets stronger and people continue to generate massive amounts of data, A.I. is making its way into the marketplace and into your doctor's examination room. Hari Sreenivasan has the latest in series on breakthroughs in invention and innovation. HARI SREENIVASAN: Advances in artificial intelligence continue to push the boundaries between science fiction and reality, like this brain-controlled device at the University of Minnesota. It enables users to fly a model helicopter with only their thoughts.