Progressives are pushing for a wealth tax targeted at the ultra rich like Jeff Bezos and Elon Musk. However, as it turns out, taxing the richest people in the world is easier said than done.

Shatner, 90, became the oldest person to fly into space, according to Blue Origin. The company, owned by billionaire Jeff Bezos, launched its first human spaceflight in July.

In April, NASA chose Elon Musk's SpaceX to receive a highly sought-after $2.9 billion contract. It would involve the first spacecraft to land humans on the moon since 1972.

Corporate boards often try, but fail, to rein in CEOs and other top execs like Jeff Bezos from risky hobbies — like traveling to the edge of space.

Jeff Bezos gave $100 million each in "courage and civility awards" to CNN's Van Jones and chef José Andrés.

From "Woo-hoo!" to "Who wants a Skittle?" here's what Jeff Bezos and his crew said on their 10-minute Blue Origin flight to the edge of space.

The Amazon founder became the second billionaire this month to reach the edge of space — following Richard Branson, who rocketed there aboard a vessel made by his company Virgin Galactic.

Passengers joining Jeff Bezos on the suborbital flight will include Oliver Daemen, 18, and Wally Funk, 82. Funk was older than Daemen is now back in the 1960s when she trained to be an astronaut.

Richard Branson started Virgin Galactic 17 years ago to make space travel possible for his generation. This weekend he'll be on its first fully crewed test flight to space, beating Jeff Bezos by days.

Bezos is handing day-to-day duties to his longtime deputy Andy Jassy but will continue to hold considerable sway as executive chairman.

Facebook's Mark Zuckerberg is expected to attend. So is Apple's Tim Cook. A look inside the Sun Valley conference for top media and tech moguls organized by a little known investment firm.

Scott said she is "attempting to give away a fortune that was enabled by systems in need of change." She has given away more $8 billion of her fortune so far.

Amazon billionaire Jeff Bezos is going up July 20 on a rocket made by his space exploration company Blue Origin. So is his brother. And now a mystery bidder has won an auction to join them.

NPR's Scott Simon ponders the child tax credit, why it was created and why someone as wealthy as Amazon founder Jeff Bezos would get it.

"Ever since I was five years old, I've dreamed of traveling to space," Bezos said. The 11-minute flight will take place two weeks after the billionaire steps down as Amazon CEO.