Sign up for our daily briefing

Make your busy days simpler with Axios AM/PM. Catch up on what's new and why it matters in just 5 minutes.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Catch up on the day's biggest business stories

Subscribe to Axios Closer for insights into the day’s business news and trends and why they matter

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Sign up for Axios Pro Rata

Dive into the world of dealmakers across VC, PE and M&A with Axios Pro Rata. Delivered daily to your inbox by Dan Primack and Kia Kokalitcheva.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Sports news worthy of your time

Binge on the stats and stories that drive the sports world with Axios Sports. Sign up for free.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Tech news worthy of your time

Get our smart take on technology from the Valley and D.C. with Axios Login. Sign up for free.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Get the inside stories

Get an insider's guide to the new White House with Axios Sneak Peek. Sign up for free.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Catch up on coronavirus stories and special reports, curated by Mike Allen everyday

Catch up on coronavirus stories and special reports, curated by Mike Allen everyday

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Denver news?

Get a daily digest of the most important stories affecting your hometown with Axios Denver

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Des Moines news?

Get a daily digest of the most important stories affecting your hometown with Axios Des Moines

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Twin Cities news?

Get a daily digest of the most important stories affecting your hometown with Axios Twin Cities

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Tampa Bay news?

Get a daily digest of the most important stories affecting your hometown with Axios Tampa Bay

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Charlotte news?

Get a daily digest of the most important stories affecting your hometown with Axios Charlotte

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Nashville news?

Get a daily digest of the most important stories affecting your hometown with the Axios Nashville newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Columbus news?

Get a daily digest of the most important stories affecting your hometown with the Axios Columbus newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Dallas news?

Get a daily digest of the most important stories affecting your hometown with the Axios Dallas newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Austin news?

Get a daily digest of the most important stories affecting your hometown with the Axios Austin newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Atlanta news?

Get a daily digest of the most important stories affecting your hometown with the Axios Atlanta newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Philadelphia news?

Get a daily digest of the most important stories affecting your hometown with the Axios Philadelphia newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Chicago news?

Get a daily digest of the most important stories affecting your hometown with the Axios Chicago newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Sign up for Axios NW Arkansas

Stay up-to-date on the most important and interesting stories affecting NW Arkansas, authored by local reporters

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top DC news?

Get a daily digest of the most important stories affecting your hometown with the Axios DC newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Boom Supersonic, a Colorado startup that is developing a new class of supersonic commercial aircraft, has raised $33 million in Series A funding. Backers include Y Combinator Continuity Fund, RRE Ventures, Palm Drive Ventures, Caffeinated Capital and 8VC. As part of the deal, YC president Sam Altman and former Sequoia Capital partner Greg McAdoo have joined Boom's board of directors.

Why now: It's been more than a decade since the Concorde was grounded, which was more about post 9/11 economics than supersonic technology. Boom is hoping to significantly decrease the cost-per-flight, in part because of two major development advancements since the time of Concorde:

  1. Even though Boom is already testing in real wind tunnels, it can do a lot of simulation via software.
  2. Companies like Boeing and Airbus have spent billions of dollars helping to develop and gain approvals for carbon fiber, which can help a plane go faster and use less gas.

Plans: Proceeds from this financing are expected to get Boom to its first supersonic flight in 2018 (a bit later than originally expected), with later plans to have passengers flying in the 2020's. Interim financing would be aided by a previously-announced $5 billion in pre-orders from companies like Virgin, with expectations that additional airline orders will be disclosed later this year.

Fun fact: The company's headquarters is on an old airfield, and its conference room was originally built as an airplane hanger.

Bottom line: There currently is a U.S. ban on supersonic flight over land, which is why Boom's initial plan is to run on existing supersonic corridors like LA-Tokyo and NYC-London. "The aircraft speed limit is one of the worst ideas in aviation policy history," Boom CEO Blake Scholl tells Axos. "Boom is working to overturn this, but not counting on that in our business model."

Go deeper

Updated 20 mins ago - Sports

MLB enters first lockout since '95 as deal expires

Baseball Commissioner Rob Manfred (L) and Major League Baseball Players Association executive director Tony Clark. Photo: Matt King/MLB via Getty Images

Major League Baseball's collective bargaining agreement expired at 11:59 p.m. ET Wednesday without a new deal in place.

Why it matters: With no CBA, the MLB is in a management lockout — the first work stoppage since a 1994-95 strike led to the cancelation of the World Series for the first time in 90 years.

Media giants back Bannon's bid to release Jan. 6 documents

Former Trump adviser Steve Bannon at the FBI Washington Field Office in Washington, DC., in November. Photo: Win McNamee/Getty Images

A coalition of news outlets including the Washington Post is supporting Stephen Bannon's campaign for the release of documents related to his contempt of Congress charges, WashPost confirmed Wednesday.

Why it matters: WashPost, the New York Times, CNN, NBC, the Wall Street Journal's parent company and others filed a motion arguing that a proposed protective order seeking to prevent the documents from being released violates the First Amendment, per the Daily Mail, which first reported on the news.

Symone Sanders leaving VP's office

Vice President Kamala Harris and her press secretary Symone Sanders. Photo: Alex Wong/Getty Images

Symone Sanders, senior advisor and chief spokesperson to Vice President Kamala Harris, is leaving the VP’s office by the end of this year, three White House officials told Axios on Wednesday.

Why it matters: The VP has faced an onslaught of criticism in her first year centered on her leadership and staff, adding to the suggestion, she’s not the Democratic Party’s preferred nominee for 2024.

You’ve caught up. Now what?

Sign up for Mike Allen’s daily Axios AM and PM newsletters to get smarter, faster on the news that matters.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!