Hey everyone, I'm Jenni from CBC's Your Community team, and I'll be running today's live coverage. Feel free to post questions or thoughts at any time.
Marsalis appeared in a Sesame Street sketch in 1985, playing trumpet with Hoots the Owl.
For a more classic performance of vocals and trumpet, check out this video from December 2012 in New York.
Plenty of other guests are expected to perform or speak at today's event, including Rev. Al Sharpton, Jamie Foxx, two former U.S. presidents Jimmy Carter and Bill Clinton, as well as current U.S. president Barack Obama.
Civil rights activist Jesse Jackson spoke to CBC about Martin Luther King Jr.'s 'I Have a Dream' speech today.
At age 22, he was in the crowd when MLK made the speech in 1963. He told CBC he expected something excellent, never imagining something extraordinary.
We're just a few minutes away from the start of today's live coverage. Stay tuned!
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Thanks for sharing this with us, Shelley C!
From the Duke Ellington School of the Arts, Geraldo Marshall, is starting off the event with "When the Saints Go Marching In" on trumpet.
Looks like Geraldo Marshall replaced Wynton Marsalis for the Trumpet Call.
U.S. broadcast journalist and philanthropist Soledad O'Brien is emcee of the event. She is now speaking.
She mentions how there were security concerns for the 1963 speech, how some people thought it would be dangerous to show up, or that no one would show up at all.
"It was your commitment to change the world for the rest of us who were not there." - O'Brien, to those in the crowd who were at the original speech.
Pastor Bernard from Christian Cultural Center is now speaking.
"Lynchings, beatings, castrations and more lynchings. It almost passes human understanding how our people can be ... so degraded, but yet culturally influential."
80 per cent of the people who marched on Washington in 1963 we black, says Bernard.
He references Obama, saying the U.S. was finally ready for a black president when he was elected. "He also brought swagger."
He asks about where the 'dream' is today.
"The struggle is not over."
Bernard is now leading the crowd in prayer. "Give us wisdom... give us leadership. Give us a vision for the future. For without it, we will not move beyond the achievements of the past."
14th Ambassador to the U.S. Andrew Young is now up... and leading the entire crowd in the singing of "I woke up this morning (with freedom on my mind)."
"We were going to redeem the soul of America from the triple evils of racism, war and poverty." - Young, referencing King's speech.
A pint-sized speaker is now on-stage. A young boy in a black suit.
"Keep dreaming, keep dreaming, keep dreaming," he says.
"I wasn't here 50 years ago," he says, "but I hope to be in another 50 years."
"The ideas that shaped us as a nation...the values we fought and died for, will be preserved forever," says the next speaker.
District of Columbia mayor Vincent Gray up next to speak.
"We sent our sons and daughters to fight overseas, but don't get to practice it fully here at home."
"We must let freedom ring!"
"We must let freedom ring from Capital Hill itself until all our residents...are truly free."
Winans is singing "I Believe" in some powerhouse vocals.
Sen. Angus King from Maine is now up.