Elena Kagansworn in as the Supreme Court's newest member in Washington

Chief Justice John G. Roberts, Jr., watches Elena Kagan (L) sign her oath of office in the Justices’ Conference Room in the Supreme Court Building in Washington on August 7, 2010. Kagan, 50, who replaces retired Justice John Paul Stevens, becomes the fourth woman to sit on the high court and is the first Supreme Court justice in nearly four decades with no previous experience as a judge. UPI/Steve Petteway/HO