The mosquito-borne disease is common in the U.S. territory, but "cases have exceeded historical figures" so far this year, said Puerto Rico Health Secretary Carlos Mellado.
"It's about destabilization. It's about undermining trust in institutions: government, monarchy, media -- everything," one security expert told NBC News.
A State Department official told NBC News she felt she had no choice but to quit over American support for Israel, while a new poll found that a majority in the U.S. now oppose its ally's actions in Gaza.
U.S. News & World Report senior health editor joins TODAY to share the outlet's top picks for over-the-counter products, ranging from allergy medicines to sunscreen.