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An extended Fifth Estate interview with Pierre Sprey, designer of the A-10 and a key figure behind the F-16, arguing the F-35 is an over-engineered, expensive failure.

In a CNBC interview with Becky Quick, Warren Buffett explains why he sees bitcoin as an asset that produces nothing. He contrasts it with productive assets such as a farm.

A 13-minute clip from This Week in Startups in which Chamath Palihapitiya describes venture capital as a Ponzi-like scheme driven by fees and inflated valuations among VCs.

A short clip in which Carl Icahn tells the story of his first activist investment and of firing 12 floors of people, arguing activism need not be short term.

A short Channel NewsAsia interview clip in which MasterCard's Southeast Asia president voices distrust of cryptocurrencies produced by anonymous computers in anonymous places. It is part of the Perspectives series and runs about four minutes.

A 20-minute Y Combinator interview in which Sam Altman asks Elon Musk how to build the future. Topics include which problems a 22-year-old should work on, such as AI, genetics, and brain interfaces, and general advice for founders.

A 1997 interview with Jeff Bezos taped at a Special Libraries conference, where he explains why Amazon started with books and why the web made it possible. He calls it the Kitty Hawk stage of electronic commerce.

A short clip of molecular biologist Cristina Sanchez describing her lab research on how THC affects cancer cells. It is uploaded on a channel promoting cannabis as a cancer treatment.

A BBC Politics Live interview in which Andrew Neil presses conservative commentator Ben Shapiro on his past statements and an incident involving Corey Lewandowski and a reporter. It is a tense, widely shared exchange.

BBC Newsnight's exclusive interview with journalist Glenn Greenwald about Edward Snowden, the PRISM revelations, and mass surveillance by the NSA and GCHQ.