A federal court blocks President Donald Trump from imposing sweeping tariffs on imports under an emergency powers law. Also, the Trump administration announces it will “aggressively” revoke visas for Chinese students studying in the U.S. Plus, a viral video of a 20-foot shark spotted off the coast of Rhode Island sparks an online frenzy, racking up millions of views. And, a closer look at how to cut cooling and energy costs as temperatures rise heading into summer.