Earth Defenseless Against Minor And Major Asteroid Impacts, Expert Warns: 'Sooner Or Later' We ...The InquisitrTo provide proper perspective, the Chelyabinsk meteor that detonated in the atmosphere over Russia in February 2013 damaged buildings and ...NASA's DART to test an asteroid defense techniqueBlasting NewsIn 2013, the Chelyabinsk meteor, a 25-meter rock, burst apart in the skies over the