They are not "closed", there just aren't any available vacancies in those domiciles right now. Vacancies are bid monthly and anyone already on the property has first shot at any openings in those bases; anything left open after that could be awarded to newhires. The best idea if you want Eagle and MIA or LAX would be to accept another base with the ATR (MIA) or SF3 (LAX) or EMB (LAX) and then put in for a transfer. Otherwise you may be waiting a long time to get hired.