More oil washes ashore in Florida and Alabama ahead of the president's second tour.
As President Obama makes his way back to the Gulf Coast for the third time since the Deepwater Horizon oil spill a new cap is on the fractured riser,
but clouds of oil are still pouring into the sea.
"What you see leaking out are the four vents on the top of this cap, and in the course of the day as we began to get the system operating we will close those four vents," BP Chief Operating Officer Doug Suttles explained.
That process includes mixing in methanol and warm water to prevent hydrates from forming, which would result in a frozen slush that could block the flow of oil.
It will still be a couple of days before we know how effective the cap might be.
There are new pictures of the devastation that seem to indicate the clean-up effort to this point has been anything but effective, dramatic images of birds swallowed by the muck, some struggling to breathe.
There's also a growing fear about what can't be seen, what plumes of oil may be doing to marine life below the surface.
"I don't really know where to begin, I would think it would be impossible to get offshore in an armada of boats and save every animal being oiled, it just wouldn't be possible," lamented the Florida Fish and Wildlife Conservation Commission's Blair Witherington.
Thick, nasty tar balls are now washing ashore on Florida's Pensacola Beach.
Residents have started their own clean up efforts.
Some fear it could last all summer.
Even with the cap now over the leaking riser the ultimate fix is still considered to be the relief wells crews are currently drilling.
They won't be finished until sometime in august at the earliest.