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:

The U.S. is imposing sanctions on 13 foreign entities and individuals in China, Iraq, Russia, and Turkey for supporting proliferation programs in Iran, North Korea, and Syria. We will continue to use all available measures to prevent #Iran from advancing its missile capabilities.