After installing the new cap on the broken Macondo well in the Gulf of Mexico, and then fixing a last-minute crack in the cap, BP has announced this afternoon that, for the first time since April, the flow of oil from the well has completely stopped.

An integrity test on the 75-ton cap is underway, to make sure it will continue to hold back the flow until a permanent solution is in place.

Over 150 million gallons of oil are estimated to have flooded into the Gulf of Mexico since the blowout on April 22.