A World War I memorial cross sits in Bladensburg, Md., just outside Washington, D.C. The federal government asked the Supreme Court to rule in favor of the cross, which critics say is an unconstitutional state religious endorsement.

A World War I memorial cross sits in Bladensburg, Md., just outside Washington, D.C. The federal government asked the Supreme Court to rule in favor of the cross, which critics say is an unconstitutional state religious endorsement.