In the aftermath of the February 2013 Chelyabinsk meteor explosion—where an approximate asteroid entered the atmosphere undetected at about Mach 60, becoming a brilliant superbolide meteor before exploding over Chelyabinsk, Russia —the B612 foundation experienced a "surge of interest" in its project to detect asteroids, with a corresponding increase in funding donations. After providing Congressional testimony Dr. Lu noted that the many online videos recorded of the asteroid's explosion over Chelyabinsk made a significant impact on millions of viewers worldwide, saying "There's nothing like a hundred YouTube videos to do that."