Last year on an American flight fifteen minutes out from Puerto Rico to Boston there was an odor from the cockpit. It smelled like burning electrical wiring. The FAs actually announced that passengers should not panic. We turned around, landed safetly in PR and waited an hour before agents said the plane was ok to fly. Many people took alternate flights. We got upgraded to business class. Weeks later we received a letter apologizing and giving us each 5,000 additional AA miles. We appreciated the recognition of inconvenience and the token of apology.