@MaxTesla: Rod and Will are right, you just aren't diagramming the sentences correctly. Read the following:
"Asteroids and meteors have been a common topic of discussion this past year, particularly following February's massive explosion over the Russian town, Chelyabinsk. Exploding with the force of several Hiroshima bombs, the 500 kiloton boom killed townsfolk and razed buildings."
The "boom" in the second sentence is not the atomic bombing of Hiroshima (Which was equal to 16 kilotons, not 500), it's the impact of the meteor mentioned in the first sentence. Describing the impact of the Hiroshima bombing with "killed townsfolk and razed buildings" would be the understatement of the century.
Of course, we don't know what the actual force of the Chelyabinsk detonation was (The only estimate I've seen was 640 kilotons, not 500), it didn't kill anybody, and it didn't raze any buildings - this is hyperbolic falsity, the likes of which I'm not used to seeing on this site.