Lyndon Johnson actually said...

"America is going to persist."

"So, men have the right to protest the condition of their lives, but they also have the responsibility not to injure the person or the property of others in making that protest."

"We are there for another reason, too, and that is because the United States must stand behind its word, even when conditions have added to the cost of honoring a pledge that was given a decade ago."

"I wish that I could tell you today that the end is in sight."