Shumita Basu

And on Saturday, March 15th, a Signal user in the chat named Pete Hegseth texted the group operational details of planned strikes against the Houthis, what kind of weapons the U.S. would be using, and information about targets. The Hegsath account said the strikes would start in several hours, so Goldberg waited to see what would happen.

And sure enough, he started to see reports on social media about explosions in Yemen's capital. Here's Goldberg talking to PBS.

And sure enough, he started to see reports on social media about explosions in Yemen's capital. Here's Goldberg talking to PBS.

And sure enough, he started to see reports on social media about explosions in Yemen's capital. Here's Goldberg talking to PBS.

Both the National Security Council and the White House have since confirmed the existence and authenticity of this group text. However, President Trump told reporters in a press briefing on Monday that he didn't know about the chat.

Both the National Security Council and the White House have since confirmed the existence and authenticity of this group text. However, President Trump told reporters in a press briefing on Monday that he didn't know about the chat.

Both the National Security Council and the White House have since confirmed the existence and authenticity of this group text. However, President Trump told reporters in a press briefing on Monday that he didn't know about the chat.

In addition to the highly classified military information Goldberg was given access to, this group text also revealed information about the identities of active CIA personnel, and information that Goldberg says could have conceivably harmed U.S. military and intelligence operatives in the Middle East.

In addition to the highly classified military information Goldberg was given access to, this group text also revealed information about the identities of active CIA personnel, and information that Goldberg says could have conceivably harmed U.S. military and intelligence operatives in the Middle East.

In addition to the highly classified military information Goldberg was given access to, this group text also revealed information about the identities of active CIA personnel, and information that Goldberg says could have conceivably harmed U.S. military and intelligence operatives in the Middle East.

I should note, The Atlantic did not publish any of those plans or other classified details, but former U.S. officials told Goldberg, this is why a messaging app like Signal should never be used for sensitive information. Had any of these officials' phones been lost, stolen, or hacked, the signal messages could have been accessed, which would have been a serious threat to national security.

I should note, The Atlantic did not publish any of those plans or other classified details, but former U.S. officials told Goldberg, this is why a messaging app like Signal should never be used for sensitive information. Had any of these officials' phones been lost, stolen, or hacked, the signal messages could have been accessed, which would have been a serious threat to national security.

I should note, The Atlantic did not publish any of those plans or other classified details, but former U.S. officials told Goldberg, this is why a messaging app like Signal should never be used for sensitive information. Had any of these officials' phones been lost, stolen, or hacked, the signal messages could have been accessed, which would have been a serious threat to national security.

That's why the government has its own internal system for sharing classified information, which all cabinet-level members have access to. Raising further legal questions, Waltz, the national security advisor, also set some of the messages in the group chat to disappear after a period of time.

That's why the government has its own internal system for sharing classified information, which all cabinet-level members have access to. Raising further legal questions, Waltz, the national security advisor, also set some of the messages in the group chat to disappear after a period of time.

That's why the government has its own internal system for sharing classified information, which all cabinet-level members have access to. Raising further legal questions, Waltz, the national security advisor, also set some of the messages in the group chat to disappear after a period of time.

A former director of litigation at the National Archives and Records Administration told The Atlantic, unless these Trump officials forwarded the messages from the signal chat to an official government account or copied them to one, they may have violated federal records law. Text messages about official acts are considered records that must be preserved.

A former director of litigation at the National Archives and Records Administration told The Atlantic, unless these Trump officials forwarded the messages from the signal chat to an official government account or copied them to one, they may have violated federal records law. Text messages about official acts are considered records that must be preserved.

A former director of litigation at the National Archives and Records Administration told The Atlantic, unless these Trump officials forwarded the messages from the signal chat to an official government account or copied them to one, they may have violated federal records law. Text messages about official acts are considered records that must be preserved.

Goldberg told PBS all of these oversights highlight the recklessness of the group chat.