Can you identify the well-known leader who made the following statements?
1. "I have a dream."
2. "The only thing we have to fear is fear itself."
3. "The buck stops here." (Clue: US president named Harry)
4. "Ask not what your country can do for you, but ask what you can do for your country."
5. "Give me liberty or give me death."
6. "Walk softly and carry a big stick.