The First Amendment of the US Constitution guarantees that all individuals have the right to express themselves freely. The US Supreme Court stated in Tinker v. Des Moines Independent Community School District (7-2, 1969) that "it can hardly be argued that either students or teachers shed their constitutional rights to freedom of speech or expression at the schoolhouse gate."   In the 1970 case Richards v. Thurston (3-0), which revolved around a boy refusing to have his hair cut shorter, the US First Circuit Court of Appeals ruled that "compelled conformity to conventional standards of appearance" does not "seem a justifiable part of the educational process."  Clothing choices are "a crucial form of self-expression," according to the American Civil Liberties Union of Nevada, which also stated that "allowing students to choose their clothing is an empowering message from the schools that a student is a maturing person who is entitled to the most basic self-determination."  Clothing is also a popular means of expressing support for various social causes and compulsory uniforms largely remove that option. In Oct. 2013, students at Friendly High School in Prince George's County, MD, were not allowed to wear pink shirts to support Breast Cancer Awareness Month. As a result, 75 students received in-school suspensions for breaking the school's uniform restrictions.