We call them sunk costs because they're amounts invested in immovable assets. We purchased an old pipeline that was already in operation at a cost of $4.5 billion and undertook its expansion. Consequently, that pipeline was essentially doubled in length to increase capacity. That cost $34 billion, plus a few million more. If we add those amounts together, it's $38 billion plus a few hundred million dollars. Those amounts were invested to acquire an asset and double or significantly increase that asset's capacity. Such assets cannot be easily transferred elsewhere. Simply speaking, it's essentially a giant steel hose snaking through the Rocky Mountains. That steel hose transports oil along a well-defined route.