That’s obviously ridiculous — the object that detonated over Russia was only 50 feet across, and could easily be blasted to bits using conventional explosives. The problem is in detection, which has grown a lot since 1994’s SL-9 impact on Jupiter, but clearly it still lags when something this size comes in with no warning.
I don’t consider 50 ft cataclysmic. I’m talking about those mile wide asteroids that do hit the earth every billion years.
Some believe that the object over Russia was indeed blasted to bits by some sort of munitions.. There are articles on the web discussing extraterrestrial intervention and even a photo of a craft visible in the area at that moment. Interesting stuff.