Here's what we're working on for tonight...

The trial for Egypt's former President Hosni Mubarak started today. He was bedridden and in a mesh cage and that shocked a lot of Egyptians who haven't seen him in almost six months. Mubarak is accused of corruption and complicity in the death of protesters during the uprising that ousted him. Tonight we'll have the latest from Cairo. We'll also have the latest from Syria where there's been more violence and more deaths in the streets and ask: Has the Arab Spring stalled?

Plus, the computer security company McAfee revealed a five-year hacking scheme that targeted countries, companies and numerous organizations. McAfee says there were more than 70 intrusions from the same source over the past five years, including four in Canada. Our take: How worried should we be about the threat of cyber war?

And Nik Wallenda has convinced the mayor of Niagara, and the U.S. state legislature to allow him to walk over the Niagra Falls on a tightrope. Wallenda's biggest obstacle is convincing the Niagara Parks commission which has banned stunts for decades. He goes before the Commission tomorrow. Tonight, he makes his case to us.

Tune in tonight at 8 p.m. ET on CBC NN.