A guide from the national intelligence director’s office says “information providing indication or warning that the U.S. or its allies are preparing an attack” should be top secret.

Waltz and at least one senior aide used the commercial email service to discuss sensitive government matters, The Washington Post reported.

President Donald Trump is making his clearest commitment to not fire anyone over an embarrassing accidental leak of his administration’s plans for an airstrike against the Houthis in Yemen.

The fallout continues following Jeffrey Goldberg's report that top members of President Trump's national security team discussed military attack plans in a Signal group chat that inadvertently included Goldberg.

Private launch companies Rocket Lab and Stoke Space have been selected to compete for future U.S. national security space launches.

But the firms fear the orders are being written so broadly as to potentially weaken national security by calling into question the status of security clearances of lawyers who, in addition to their legal practice, serve as military reservists and require their clearances to report to duty.