Over the past few years, Twitter has coarsened the political discourse, aided outrage mobs, exposed the bias and ignorance of many media figures, and provided a forum for a president to vent his unfiltered thoughts. But the social media platform is increasingly turning into something much worse — a national security risk.

Earlier this month, scammers were able to access the accounts of high-profile users and send out tweets from their accounts imploring people to transfer them money. They only managed to steal about $120,000, but more worrisome was the fact that outsiders were able to gain temporary control of the accounts of Barack Obama, Joe Biden, Jeff Bezos, Bill Gates, and Elon Musk.