Tens of thousands of people are crowding Washington Friday to protest the landmark U.S. Supreme Court decision that legalized abortion.
This year marks the 40th anniversary of the Roe v. Wade decision.
Abortion opponents hold what they call the March for Life every year. This year's march includes a rally near the U.S. Capitol and a protest outside the Supreme Court building.
Dozens of people came out in sub-freezing temperatures for the actual anniversary Tuesday to spread 3,300 flowers outside the court. Organizers say the number represents the number of abortions in the United States every day.
Anti-abortion activists have been trying for 40 years to get Roe v. Wade overturned. Federal and state lawmakers have also fought for restrictions on abortions. They say life begins at the moment of conception and that science backs them up. They also say some women use abortion as a form of contraception.
Abortion rights activists along with many doctors say legalized abortion is a basic right.
The supporters say Roe v. Wade has saved thousands of lives of women whose health would have been in danger if they had to have a child. They also argue that women are no longer forced to seek unsafe abortions or even try the procedure on themselves with deadly results.
The abortion rights group, National Organization for Women, held a candlelight vigil Tuesday evening in front of the Supreme Court to mark the 1973 decision.
A new NBC News-Wall Street Journal poll shows that 54 percent of Americans believe abortion should remain legal in almost all circumstances. The survey finds 70 percent oppose overturning Roe v Wade.
President Barack Obama has also come out in favor of abortion rights.