Martin Luther King Jr.'s granddaughter delivers emotional speech at 'March for our Lives' in D.C.

WASHINGTON -- Martin Luther King Junior's granddaughter Yolanda Renee King delivered a powerful message to the crowd in D.C. during the 'March for our Lives' event.

"I have a dream that enough is enough and that this should be a gun-free world, period," King said.

PHOTOS: March for our Lives signs and calls to action.

The rally drew a massive crowd to Washington to call on lawmakers to address gun laws and school safety.