A senior squadron is one that is only open to senior, or adult, members. A cadet squadron is for cadet members but, will have some senior members who work with the cadets. A composite squadron is one that is made up of both senior and cadet members. A flight is a smaller version of a squadron but, operates much the same way as a typical squadron. A group oversees several squadrons in a given area and in some cases is not open for new members to join. The group staff would be a good source of information regarding individual squadrons and their activities. A wing is a state headquarters and, like the group headquarters, is more administrative in nature and is not open for new members to join. Although, if you have difficulty finding a squadron, the wing headquarters would be able to assist you in your search. A region is made up of several wings, or states. These are also more administrative in nature and closed to new members.