Good Morning! I have a DS 2020 grad and my younger applying for second time. We haven't received a no letter or a yes phone call. we are still waiting in limbo. My older got called on May 13th his year. trying to stay positive. What is a letter of assurance (LOA) and is it direct appointment if my younger went to Univ of TN at Knox for a year? If not, then what would I put on thread? Thank you. USAFA has been an incredible blessing to our family and we would be honored to send our younger.