April 3, 2020 Air Force postpones boards due to COVID-19 restrictions JOINT BASE SAN ANTONIO-RANDOLPH, Texas – The Air Force is postponing promotion boards for the CY20B Colonel Biomedical Sciences Corps and Chaplain; CY20C Lieutenant Colonel Chaplain and Nurse Corps; and CY20B Chaplain Central Selection Boards, originally scheduled to convene here June 8. The boards