The White House announced Monday it has closed its investigation into the Signal messaging app controversy, which erupted after The Atlantic editor-in-chief Jeffrey Goldberg was inadvertently added to a secure group chat discussing U.S. plans for airstrikes against Houthi targets in Yemen.

Key Developments:

• Official Closure: White House press secretary Karine Jean-Pierre stated: "This Signal matter is now closed as far as we're concerned."

• Preventive Measures: "Steps have been taken to ensure this doesn't happen again" (specific protocols undisclosed)

• Classification Denial: Administration maintains shared information was not classified

Incident Timeline:

1. Security Breach: Goldberg received automated notifications from the encrypted chat group

2. Content Viewed: Discussions included Yemen strike planning (exact details redacted)

3. Media Disclosure: The Atlantic later reported the mishap

Historical Context:

• Follows Donald Trump's precedent of using Signal for sensitive military communications

• Highlights ongoing tension between encrypted messaging and operational security