The U.S. Air Force has an official website at www.af.mil. The Air Force Portal has a senior leadership which shows the bios of the Secretary of Air Force, Chief of Staff and the Chief Master Seargent. The Air Force portal also has other updates such as the promotion release result on its portal site.
For those who need to login, you should go to the Air Force Portal at https://my.af.mil. However, there are cases when the secure connection would fail because it says that the site uses an invalid security certificate. The best thing to do is to wait before trying again versus trying to add a security exception for the browser. Meanwhile, the non secure version of www.af.mil should typically be still available.