Martin Luther King Jr.'s "I Have a Dream" speech in Washington, D.C. in 1963 gives me goose bumps every time I hear it. Today is Martin Luther King Day. Here is the heart of it:

In the current political climate, King's speech stands out even more. Five years later, in 1968, Martin Luther King Jr. was assassinated. He was just 39 years old.

"We cannot walk alone. And as we walk, we must make the pledge that we shall march ahead. We cannot turn back." - Martin Luther King Jr.