In the past few weeks, some of the biggest industries in the U.S. have been held up by cyberattacks.

The first big infiltration was at Colonial Pipeline, a major conduit of gas, jet fuel and diesel to the East Coast. Then, J.B.S., one of the world’s largest beef suppliers, was hit.

The so-called ransomware attacks have long been a worry. But who are the hackers and how can they be stopped?

Guest: Nicole Perlroth, a reporter covering cybersecurity and digital espionage for The New York Times. 

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The Daily is doing a live online event: We follow up with students and faculty from our series Odessa. And we hear from the team who made the documentary. Times subscribers can join us June 10.

Background reading: 

• The Biden administration has taken steps to counter the growing threat of cyberattacks on U.S. businesses. The F.B.I. director compares the danger of ransomware to the 9/11 terror threat.
• As the ransomware industry exploded, a Russian-speaking outfit called DarkSide offered would-be computer criminals not just the tools, but also customer support. Here’s how the group became a hacking powerhouse.
• It’s been almost a decade since Leon Panetta, then the secretary of defense, warned of an impending “Cyber Pearl Harbor.” He didn’t want to be right.

For more information on today’s episode, visit nytimes.com/thedaily. Transcripts of each episode will be made available by the next workday.