Democrats grill Trump officials on why they used a commercial app to discuss war plans

A typically ordinary Senate hearing on threats to the U.S. became contentious following news of a major national security breach. Jeffrey Goldberg, the editor-in-chief of The Atlantic, revealed Monday that he was accidentally put into a chat on Signal with top officials as they discussed military strikes in Yemen. Two of those officials testified in the Senate hearing. Lisa Desjardins reports. PBS News is supported by - https://www.pbs.org/newshour/about/funders