( CNN ) -- NEW : Nation 's first African-American governor says apology was the right thing to do . Virginia Gov . Bob McDonnell says not mentioning slavery was `` major omission '' and he apologizes for it. His proclamation of April as Confederate History Month in state has drawn criticism .
NEW : Nation 's first African-American governor says apology was the right thing to do . Virginia Gov . Bob McDonnell says not mentioning slavery was `` major omission '' and he apologizes for it. His proclamation of April as Confederate History Month in state has drawn criticism .