In one case, he told aides on the encrypted app to inform foreign governments about an unfolding military operation, people familiar with his management practices said.

Defense Secretary Pete Hegseth reportedly directed a desktop computer in his Pentagon office be installed with the messaging app Signal, adding another layer to the controversy around his use of

The move was intended to circumvent a lack of cellphone service in much of the Pentagon and enable easier communication between Hegseth and other Trump officials, said people familiar with the matter.