Step-by-step explanation:
First, he begins by saying how he and the first lady personally felt towards the loss of the space crew members. "Nancy I know we share this pain with all of the people of our country", said President Ronald Reagan.
He goes further to say, "the Challenger crew was pulling us into the future and we'll continue to follow them." By such careful use of words, the President could reach the emotions of his listeners, thereby persuading them towards supporting the space program despite its challenges.