International, MNA | A meteor crashing toward Earth exploded over the northeastern United States on Saturday, NASA said, setting off booms that echoed over the region with a blast equivalent to 300 tons of TNT. A meteor crashing toward Earth exploded over the northeastern United States on Saturday, NASA said, setting off booms that echoed over the region with a blast equivalent to 300 tons of TNT. The fireball broke up over northeastern Massachusetts and so... [1004 chars]