Top national security officials — in the White House, the Pentagon and the State Department — couldn’t provide answers.

The messaging app TeleMessage recently announced that it was suspending its services after being hacked, which caused concern ...

Defense Secretary Pete Hegseth paused 11 military aid flights bound for Ukraine earlier this year without informing the ...

Roughly a week after Donald Trump started his second term as president, the U.S. military issued an order to three freight ...

Hegseth ordered the abrupt cancellation of weapons flights to Ukraine in February without Trump’s knowledge and blindsiding top national security officials.

The suspension reportedly affected 11 shipments of artillery shells and weapons from Dover Air Force Base and a U.S. base in ...

President Donald Trump has ousted National Security Adviser Mike Waltz and announced that he will nominate him as the next ...

Marco Rubio serving as both Secretary of State and national security adviser could be "ultimately disadvantageous" to ...

The Washington Post reported that Donald Trump soured on Waltz over Waltz's support for an Israeli attack on Iran.

A clone of the messaging app Signal, which was used by since-ousted national security advisor Mike Waltz, has been hacked.

The Washington Post reported that Donald Trump soured on Waltz over Waltz’s support for an Israeli attack on Iran.

President Donald Trump said Sunday that he plans to appoint a new national security advisor in about six months, telling ...