gulf of mexico, and the fix attempt going under way right now. that s a live image. it shows clouds of liquid spilling from the broken pipe. but bp says it appears to be fluid and not oil. some experts see that as a good sign. but it may be all day before we know for sure. with the moon low over the gulf of mexico, a waiting game overnight. waiting, as bp pumps heavy drilling fluid 5,000 feet down, trying to jam the broken oil well, in an operation called a top kill. we re executing this top kill job as efficiently and effectively as we can. and we ll determine over the next 24 hours whether that plan s been successful. reporter: an entire nation awaits the result. if it s successful, and there s no guarantees, it should greatly reduce or eliminate the flow of oil now streaming into the gulf from the sea floor. reporter: if it works, bp will pump concrete into the well. if it doesn t, it could be several more days before a fix is possible. in washington, political pre
it shows clouds of liquid spilling from the broken pipe. but bp says it appears to be fluid and not oil. some experts see that as a good sign. but it may be all day before we know for sure. with the moon low over the gulf of mexico, a waiting game overnight. waiting, as bp pumps heavy drilling fluid 5,000 feet down, trying to jam the broken oil well, in an operation called a top kill. we re executing this top kill job as efficiently and effectively as we can. and we ll determine over the next 24 hours whether that plan s been successful. reporter: an entire nation awaits the result. if it s successful, and there s no guarantees, it should greatly reduce or eliminate the flow of oil now streaming into the gulf from the sea floor. reporter: if it works, bp will pump concrete into the well. if it doesn t, it could be several more days before a fix is possible. in washington, political pressure over the crisis is reaching a breaking point. it is unprecedented. this, y