Top military officials, including some U.S. Central Command personnel and other combatant commanders, were recently subjected to polygraph tests as part of an investigation into leaks of classified information about U.S. weapons stockpiles. The tests, which involved several dozen individuals, were conducted earlier this summer and were reportedly triggered by media reports that revealed sensitive details about the nation’s stockpiles of advanced weapons. President Trump reportedly expressed strong frustration over the leaks, according to three anonymous sources. The information about the weapons was known by only a very small group of people, and there were concerns that someone might be leaking details to foreign intelligence agencies, one of the sources explained. Polygraph tests are not uncommon for high-ranking military and civilian officials, but the scale of this particular round of testing was unusually large, according to officials. The questions on the polygraphs focused heavily on national security topics and aimed to determine if any of the tested individuals had shared classified information with the media. According to two sources, no one failed the tests meant to identify leaks of classified information. The Pentagon did not officially comment on the matter, but Chief Pentagon spokesman Sean Parnell told CBS News that the Department takes all leaks of classified information seriously and investigates them thoroughly. He emphasized the importance of securing sensitive data to protect the United States and its military personnel deployed globally. However, not all senior military officials were tested. For instance, the chairman of the Joint Chiefs of Staff, General Dan Caine, was not subjected to a polygraph, according to a senior Pentagon official. The New York Times first reported on the polygraph tests, following earlier media coverage that highlighted the rapid use of some of the U.S.’s most advanced and limited weapons during the ongoing conflict. News outlets such as CBS News had previously reported on the pace at which these weapons were being deployed, raising concerns about the potential exposure of sensitive military information.