(Adds details throughout, comments, background) By Ian Simpson WASHINGTON, Jan 25 (Reuters) - Anti-abortion activists marched in Washington on Friday to protest the U.S. Supreme Court ruling that made abortion legal in the United States 40 years ago. Condemning abortion as an abuse of human rights, people from across the country participated in the March for Life that takes place annually in the nation's capital. The Supreme Court's Roe v. Wade ruling on Jan. 22, 1973, legalized abortion.