The total cost of the US military’s operation against the Iran-backed Houthi militants in Yemen is nearing $1 billion in just ...

The Pentagon has not publicly disclosed what impact the daily US military strikes have actually ... Waltz referenced that Houthi leader in the Signal chat in March that was disclosed by The ...

President Trump said his national security adviser, Mike Waltz, "learned a lesson" after he opened up a secret chat of Trump officials to a reporter.

He recommended moving sensitive discussions away from commercial messaging platforms such as Signal and back to secure military communication ... the leak’s potential impact on intelligence ...

NPR's Scott Simon talks to Steven Cash, former CIA officer and staff member on the Senate Intelligence Committee, about the fallout from the security breach involving defense plans and a group chat.

Trump officials mistakenly included a journalist in a Signal chat about strikes on Houthi ... discussing plans for a military strike on Houthi rebels in Yemen. Trump officials deny that classified ...

But his views on using U.S. military force and clues about the kind of advice he might give Trump behind closed doors were revealed in the Signal text message chain among senior administration ...

The sharing of military plans on Signal is a classic case of what IT ... whether a security system is easy to use has an outsized impact on the degree to which it helps improve security.