WASHINGTON (Reuters) – Supreme Court justices on Tuesday questioned whether a law that bars Americans from providing support to foreign terrorist groups violated constitutional rights of free speech and association. Some justices seemed concerned the law outlawed the provision to such groups even of advice about lawful advocacy, such as petitioning the United Nations or filing legal briefings in American courts. The hour-long arguments represented the first test to reach the Supreme Court after the September 11, 2001, attacks pitting First Amendment rights of free speech and association against government efforts to fight terrorism. Justice Ruth Bader Ginsburg said verbal...