TOPEKA, Kan. (AP) — Abortion opponents marked the 40th anniversary of the Roe v. Wade decision Tuesday with workshops, prayers and calls for more limits on the rights established by the Supreme Court in the landmark ruling that still defines one of the nation's most intractable debates.

Many in the anti-abortion movement looked to Kansas, where Republican Gov. Sam Brownback signed a series of tough anti-abortion measures during his first two years in office. Other states with GOP governors and Republican-controlled legislatures have taken similar steps.

"There's joy in what you're doing and keep it up," Brownback urged hundreds of fellow abortion opponents at a rally outside the Kansas Statehouse. "Keep marching. Keep moving."