Obviously the US is not the only country which looks for oil and resources leaving no stone unturned. Its just they are either most vocal about it or they make all the headlines everywhere.
Look here for China's largely silent (silent in the media but hardly unnoticed) hunt for oil. I must say they have been pretty ingenious in acquiring so many leads all over the world. No wonder the US is jittery about its oil reserves and the ones it controls. I really can't blame them.