Pentagon calls leak of highly classified intelligence 'very serious' risk to security

The online leaks of scores of highly classified documents about the Ukraine war present a "very serious" risk to U.S. national security, and senior leaders are quickly taking steps to mitigate the damage, a top Pentagon spokesperson said Monday. And as the public airing of the data sends shock waves across the U.S. government, the White House said there are concerns there could be additional leaks.Chris Meagher, assistant to the secretary of defence for public affairs, told reporters that U.S. Defence Secretary Lloyd Austin first became aware on Thursday that a number of classified briefing slides detailing the U.S. military efforts in the Ukraine war and intelligence involving other nations were leaked.