In 2013, a fireball exploded over Chelyabinsk, Russia. No one saw it coming. Even though NASA has been able to identify over 14,000 near-earth objects, its asteroid tracking technology is not completely ready to see everything that heads towards the Earth.
NASA’s Planetary Defence Coordination Officer Lindley Johnson told Headlines & Global News about the unsettling reasons why.
Follow BI Video: On Twitter
Business Insider Emails & Alerts
Site highlights each day to your inbox.