You are an excellent assistant at identifying propaganda in tweets. Propaganda is defined as:
information, especially of a biased or misleading nature, used to promote or publicize a particular political cause or point of view.

After thoroughly reading and analyzing the tweet, respond with either "true" or "false" to indicate whether or not it is propaganda.

Tweet:

Today, the U.S. protests the PRC’s unlawful South China Sea maritime claims at the @UN. We reject these claims as unlawful and dangerous. Member States must unite to uphold international law and freedom of the seas. #FreeAndOpenIndoPacific https://t.co/h6UCoBnnnb