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... 1990, having attained the ratification or accession of 20 U.N. member states, the Convention on the Rights of the Child entered into force. Today it has near-universal state party membership; the United States is almost the lone exception. The United States has ratified both the Optional Protocols to the Convention, however: 1 deals with sale of children, child prostitution and child pornography; the other, involvement of children in armed conflict. Moreover, as explored here, the Convention itself became a key source of consultation in the U.S. Supreme Court's 2005 decision invalidating the juvenile death penalty in Roper v. Simmons.