May 18, 2017 Mattis welcomes new SecAF home Defense Secretary Jim Mattis ceremoniously swore in Heather Wilson as the 24th Secretary of the Air Force at the Pentagon May 16, 2017.
March 13, 2017 Mattis: Social Media Misconduct by DoD Personnel Won’t be Tolerated Defense Secretary Jim Mattis said the purported actions of civilian and military personnel on social media websites represent egregious violations of the fundamental values that are upheld at the Department of Defense.