China has not held back in forcing the pace of the search for Malaysia Airlines Flight 370. It has deployed 21 satellites and a flotilla of naval ships. It has dispatched investigators to Malaysia, run background checks on the Chinese passengers, and scoured radar images of its vast western regions. Every day it has cajoled, chided and criticized Malaysian officials. And still it has come up empty-handed. Two weeks after the plane vanished on an overnight flight to Beijing, no trace of the Boeing...