President Reagan Challenger speech discussion

Video :   https://www.americanrhetoric.com/speeches/ronaldreaganchallenger.htm

President Ronald Reagan’s speech, ‘The Challenger Tribute” followed the shocking explosion of the space shuttle challenger on January 28th, 1986.  This speech is considered on the best American speeches of all times and part of the reason is his eloquence with the targeting of his various audience groups. For this activity, you should read the text and watch the speech.   As you are reading and listening to the speech, ask yourself, “what are the different audiences for this speech?” and “how does he attempt to appeal all of these audiences?”  
Complete the following:
1. List at least four audience groups addressed in the speech.
2. How do you know these are targeted audience groups? Remember that some audiences are explicitly stated while others are implied. Also, do not list “American Public” as an audience. Be more specific in your grouping and give contextual evidence.