Warning from Hezbollah, testing for cardiac arrest, threatened wild rice crop, and more

Your World Tonight

Hezbollah’s leader vows retribution for this week’s electronic device detonations targeting the Lebanese-based militant group. Hassan Nasrallah says the attacks are a declaration of war, as Israel’s military approves battle plans for its northern front with Lebanon.

And: Testing for cardiac arrest. How the tragedy of one Ontario family helped researchers solve a mystery into the causes of a killer genetic condition.

Also: A small, squirmy and very hungry pest is decimating the wild rice crop in northern Saskatchewan. But exactly what it is – remains a mystery.

Plus…the Roaring Lion is on the way home, New Brunswick calls an election, universities concerned about cuts to international student permits, and more.