oil slick in the search area. they took samples and will be analyzing them in the coming days to figure out whether that oil has anything to do with flight 370. in the meantime, the search is continuing monday with two dozen ships and aircraft looking at more than 47,000 square kilometers. take a listen. >> analysis of the four signals has allowed the provisional definition of a reduced and manageable search area on the ocean floor. the experts have therefore determined that the strand defense vessel ocean shield will cease searching with the tow ping locator later today and deploy the autonomous underwater vehicle, bluefin 21, as soon as possible. in another development i can report ocean shield detected an oil slick yesterday evening in her current search area. a sample of about two liters has