5 things to know for May 19: Election Day, mosque shooting, Iran war, Ebola outbreak, Elon Musk

By Alexandra Banner, CNN SPF 30 or 70? Waterproof or sweat-resistant? Since when did sunscreen shopping become weirdly stressful? A new report warns that many skin products fall short on safety and effectiveness, but experts say a few options are still worth grabbing. Here’s what else you need to know to get up to speed