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:

Rather than waiting for Iran to threaten the world, the U.S. is taking sweeping actions to prevent the world’s top state sponsor of terror from obtaining a nuclear weapon. This includes sanctions on 25 entities and individuals. We are keeping Americans and world citizens safe!