The United States didn’t have a working relationship with China because of Corona
The 17th parallel was the provisional military demarcation line between North and South Vietnam established by the Geneva Accords of 1954.
Too much power to the central government.
The public school students' <em>silent</em> protest, by using <em>symbols</em>, in the form of armbands, during school time, cost the students a suspension, because it was considered a <em>violation of a school rule</em>. After the case had been judged by the Supreme Court, they finally won the case. But the outcome could be different, if their protest used "indecent speech" or promoted illegal drug use.