` He understood the immensity of what he had done . NEW : NASA gives Armstrong 's family an American flag from Johnson Space Center . Hundreds attend a memorial ceremony at Washington National Cathedral . Comment: Armstrong , who became the first man to walk on the moon in 1969 , died on August 25 .
NEW : NASA gives Armstrong 's family an American flag from Johnson Space Center . Hundreds attend a memorial ceremony at Washington National Cathedral . Comment: Armstrong , who became the first man to walk on the moon in 1969 , died on August 25 .