Introduction

An investigation is under way after US fighter jets scrambled to intercept an unresponsive aircraft over the Washington DC area. The response caused a sonic boom across the nation's capital. Plus, tensions run high after a Chinese warship nearly collided with an American destroyer. And, today could be Apple's biggest product launch since the Apple watch as the company unveils its ‘mixed reality’ headset.

Also this morning: former South Carolina Governor Nikki Haley sharpened her attacks on Donald Trump and Ron DeSantis, taking questions on abortion and guns in last night's CNN Town Hall, protesters in Colorado demand action on gun violence, massive crowds march against Poland’s nationalist government, and a hero driver saves children after a school bus goes up in flames.

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