The device is attached to low-flying aircraft to identify Bluetooth signals, like those emitted from pacemakers.

The "signal sniffer" being used in the Nancy Guthrie investigation was mounted on a helicopter on Monday.

Mike Waltz, the departing national security adviser at the center of "Signalgate," is seen in new photos using the commercial messaging application during a Cabinet meeting held by President Donald ...

Why is Christian Science in our name? Our name is about honesty. The Monitor is owned by The First Church of Christ, Scientist, and we’ve always been transparent about that. The church publishes the ...

Former national security adviser Mike Waltz was photographed using a Signal-like messaging app during Wednesday’s Cabinet meeting, more than a month after he first came under intense scrutiny for ...

At least for the moment this hasn’t gotten much attention. So let me point your attention to a new part of the White House Signal chat story which is actually a pretty big deal. You likely saw that ...