President Bush yesterday signed legislation that bars a certain late-term abortion procedure in what is seen as the most significant law restricting abortion rights in the 30 years since Roe v. Wade. The legislation was challenged in court in New York, California and Nebraska. Under President Clinton, the legislation made it to the White House twice but it was vetoed both times. At a ceremony yesterday Bush said “America stands for liberty, for the pursuit of happiness and for the unalienable right of life. This right to life cannot be granted or denied by government because it does not come from government, it comes from the creator of life.”