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:

Terrific call with @IgnazioCassis today to thank Switzerland for helping repatriate U.S. citizens from Iran and serving as the U.S. protecting power in Iran. We discussed deepening economic ties and our partnership to develop a COVID-19 vaccine and treatment.