BP has placed a cap on the well, but no word if it’s working.

BP PLC has placed a containment device over a ruptured pipe that has been leaking in the Gulf of Mexico for the past six weeks, although it remains unclear how successful the effort will be in capturing the oil.
Earlier Thursday, undersea robots completed a second cut of the fractured pipe connected to the deep-water oil well, paving the way for engineers to install the containment device that officials hope will send most of the oil to a vessel at the water’s surface a mile above.
The containment-cap effort is the latest in a series of procedures attempted by the U.K. oil giant, which has been sharply criticized in recent weeks as the spill affects an increasingly wide stretch of the U.S. Gulf Coast, threatening to cause massive environmental and economic damage.
“The placement of the containment cap is another positive development in BP’s most recent attempt to contain the leak,” U.S. Coast Guard Admiral Thad Allen said in a statement late Thursday. “However, it will be sometime before we can confirm that this method will work and to what extent it will mitigate the release of oil into the environment.”