Washington CNN —The Pentagon has begun to limit who across the government receives its highly classified daily intelligence briefs following a major leak of classified information discovered last week. All the email lists have been reviewed, a senior defense official said, and some restrictions may only be temporary. Everyone on the lists had proper clearance, but not everyone needs to receive that information daily, the official added. Previously, slides from the Joint Staff briefing deck could be accessed by hundreds, if not thousands, of people across the government, officials said. “Having to scale that distribution back, even temporarily, is a bitter pill,” said the source familiar with internal joint staff deliberations.

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