Some Eagles who are nesting near a Post Office in Alaska have been attacking patrons of the mail service establishment there:
http://beta.news.yahoo.com/bald-eagles- ... 29745.html
Eagles, and all birds for that matter, are very protective of their nests and their young. Anyone that has been dive-bombed a time or two can tell you that from experience.
Very interesting that the Eagles are not a protected bird or species in Alaska as they are in the USA.