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 we remember all those who lost their lives in the #September11, 2001 terrorist attacks on the United States. We also remember that when we needed them, @NATO Allies had our back. They invoked the collective defense clause of the founding treaty &amp; came to our aid. #WeAreNATO https://t.co/NTonmthwLn