Three explosions at the main airport and in the subway of Brussels, Belgium, today left dozens of people dead. The terrorist group ISIS has claimed responsibility. Why is Belgium such a center for Islamic extremism?
Then, is Islamic terrorism an existential threat to the United States?
Next, if Donald Trump is the Republican nominee for president, what will it mean for the GOP in California?
Elsewhere in the state, we look into the mysterious world of cactus smuggling.
And finally, a new report from a pre-eminent climate scientist warns that serious environmental changes could be coming decades earlier than previously thought.