NASA's 1st flight to moon, Apollo 8, marks 50th anniversary By MARCIA DUNN, AP Aerospace Writer CAPE CANAVERAL, Fla. (AP) — Fifty years ago on Christmas Eve, a tumultuous year of assassinations, riots and war drew to a close in heroic and hopeful fashion with the three Apollo 8 astronauts reading from the Book of Genesis on live TV as they orbited the moon. To this day, that 1968 mission is considered