Corrected entry: Why did it take over a decade for someone to decide to attack the fissure the Kaiju used to travel between their world and Earth? Even if direct bomb attacks failed, wouldn't someone have at least thought of covering tons of rubble over the fissure to block the Kaiju from coming through? Or since it's the only place that the Kaiju appear from, why not set a perimeter of bombs around the fissure and detonate them every time a Kaiju came through? The ending already demonstrated that the Kaiju could be killed via explosion.
Teru_Kage
7th Aug 2013
Correction: It did not take a decade. It was stated numerous times that similar attempts had been made and all had failed. It can therefore be logically assumed that similar strategies to those this submission suggests were also attempted but each also failed for whatever reason. We weren't show any of this because it's an action movie, not a historical study of the Kaiju wars.
Phixius ★