2015 Event Health care and personal security records of 11 million customers have been stolen from Premera Blue Cross; the health care insurer operates mainly in the U.S. states of Washington and Alaska, but customers in other states may also be affected 1956 Event 1st atomic reactor built for private research operates Chicago, Illinois 1948 Event 1st locomotive to carry 1,000,000 pounds (450,000 kg) operates
