An immigration law attorney whose career has spanned over two decades said he has never experienced a hearing like the one he had in Annandale, Virginia.  “Normally, these master calendars will have 10 people, maybe sometimes 15, but usually in that range. The judge opened the hearing and said well, we have 100 cases on today's docket,” attorney Joseph M. Perez told ABC News.  Master calendar hearings are when immigrants in deportation proceedings first appear before a judge and are informed of their rights and the charges they may be facing. It’s a crucial first step in deportation proceedings that can occur on an individual basis or in groups of a few people.…