The First Amendment of the U.S. Constitution, as interpreted by the U.S. Supreme Court, provides the strongest guarantee of free speech in the world. Unlike people in many other countries, Americans are free to criticize each other and government officials in language both fair and foul, to engage in racist or other hateful speech, and to use expletives and other bad language in public. In some states, like California, they may even exercise their right to free speech on other people's private property.