The Parkland, Florida mass high school shooting is being seen as a tipping point for gun control in America.

Thousands are expected to take to the streets this weekend as part of the 'March for Our Lives'.

The Chicago protest leader for 'Moms Demand Action for Gun Sense in America', Brenna O'Brien, is expecting up to 50,000 people at Sunday's march.

She told Kate Hawkesby she's seeing things she hasn't seen for 20 years.

"There are senators that are now talking to us, that are now saying 'yes, I will now listen to you about background checks on all gun sales and raising the age to purchase a gun to 21."

LISTEN TO BRENNA O'BRIEN TALK WITH KATE HAWKESBY ABOVE