America's 250th birthday celebrations hit by extreme heat

America marks its 250th independence anniversary with celebrations across the country, including major events in Washington DC where President Donald Trump is scheduled to deliver a 45-minute speech and a world-record fireworks display is planned. Extreme heat reaching 40 degrees Celsius, feeling like 46 with humidity, has forced authorities to cancel midday events including a parade due to dangerous conditions. The celebrations have also exposed national divisions, with hundreds of uniformed members of the white supremacist group Patriot Front demonstrating in Washington DC with covered faces under police monitoring.See omnystudio.com/listener for privacy information.