As Hawaii trembles with earthquakes and the Kilauea volcano continues to spew forth lava and gas, residents and the wider world watch and wonder: how long will this renewed activity continue? To find out, we turn to Mike Garcia, professor of geology at the University of Hawaii and funded by the National Science Foundation. He has been following the eruption since its beginning, which actually bubbled to life in 1983. To better understand the history and possible future of Kilauea, I sit down with Garcia on this episode of Miles to Go.

Russian actors may have run an online disinformation campaign during the 2016 US presidential elections, but they likely learned their tactics from Americans. As part of our investigation, PBS NewsHour series producer Cameron Hickey tracked down one of these junk news pioneers, Cyrus Massoumi. He runs liberal and conservative junk news sites, which have millions of followers on Facebook. I continue my conversation with Cyrus on this episode of Miles To Go.

Russian actors may have run an online disinformation campaign during the 2016 US presidential elections, but they likely learned their tactics from Americans. As part of our investigation, PBS NewsHour series producer Cameron Hickey tracked down one of these junk news pioneers, Cyrus Massoumi. He runs liberal and conservative junk news sites, which have millions of followers on Facebook. To find out more about the murky world of junk news, I sit down with Massoumi on this episode of Miles To Go.

Top US intelligence agencies agree that Russia meddled in the 2016 US Presidential election using an organized campaign of online trolling and misinformation. The details of exactly how are harder to uncover. Jonathan Albright, data journalist and Research Director at Columbia University's Tow Center for Digital Journalism, studies information flow in networks. Recently, he has been mapping how Russian propaganda spreads on the web. I sit down with Albright on this episode of Miles To Go.

The Cambridge Analytica scandal has placed Mark Zuckerberg and Facebook at the center of the data privacy debate. But is Facebook's ad-driven business model fundamentally incompatible with protecting users' personal data? And, if so, what can be done to fix it? Miles O'Brien Productions team members Brian Truglio and Fedor Kossakovski hash it out on this special edition of Miles To Go.

The uncontained engine failure of Southwest flight 1380 reminds us once again that commercial aviation is a business that does not always put safety first - and regulators seem reluctant to change that. Jennifer Riordan's death could have been avoided if only the FAA did not have a "Tombstone Mentality." My guest on this special edition: former FAA inspector general and aviation attorney Mary Schiavo.

Long before Facebook, Twitter or even Google existed, the fact checking website Snopes.com was running down the half-truths, misinformation and outright lies that ricochet across the Internet. Today it remains a widely respected clearinghouse of all things factual and not. As part of my series for the PBS NewsHour on the rise and role of misinformation in our democracy, I spoke with Snopes.com managing editor Brooke Binkowski.

How did the internet become a tangled web of misinformation? Miles speaks to danah boyd, Principal Researcher at Microsoft Research, founder of Data & Society, and Visiting Professor at New York University. boyd offers insight into the history of misinformation on the internet and the role social media plays in the proliferation of fake news. It's an interview we did for our upcoming series on "junk news" for the PBS NewsHour.

Who or what determines what's in your Facebook Newsfeed? It's a complex algorithm that aims to put what interests you most at the top of the queue. Increasingly, Facebook is focused on trying to determine what content is fake, junk or misleading - and sending it to the bottom. But the purveyors of this content are a determined adversary. Miles speaks with their foe at Facebook, the Director of Analytics for the News Feed, Dan Zigmond. It's an interview we did for our upcoming series on "junk news" for the PBS NewsHour.

Miles catches up with Astronaut Scott Kelly and learns about what it's like to spend a year in space. Kelly talks about the physical and emotional toll of his historic mission, the challenges of CO2, radiation exposure, what scientists are continuing to learn upon his return to Earth, and what's next.