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BP encouraged that capped-off oil well still holds

 This image taken from video provided by BP PLC at 15:57 CDT, shows that oil has stopped flowing  from the new 75-ton cap atop the site of the Deepwat...
 This combo made from images taken from video provided by BP PLC shows oil flowing from two of three valves on the new 75-ton cap atop the site of the...
 This image taken from video provided by BP PLC at 14:27 CDT, shows that oil has stopped flowing from the new 75-ton cap atop the site of the Deepwate...
 This image taken from video provided by BP PLC at 17:56 CDT shows that oil has stopped flowing from the new 75-ton cap atop the site of the Deepwater...
 In this combo made from images taken from video provided by BP PLC, oil flows from two of three valves on the 75-ton cap atop the site of the Deepwat...
 This image taken from video provided by BP PLC at 15:13 CDT shows that oil has stopped flowing  from the new 75-ton cap atop the site of the Deepwate...

Gulf Oil Spill

This image taken from video provided by BP PLC at 15:57 CDT, shows that oil has stopped flowing from the new 75-ton cap atop the site of the Deepwat...

Gulf Oil Spill

This combo made from images taken from video provided by BP PLC shows oil flowing from two of three valves on the new 75-ton cap atop the site of the...

Gulf Oil Spill

This image taken from video provided by BP PLC at 14:27 CDT, shows that oil has stopped flowing from the new 75-ton cap atop the site of the Deepwate...

Gulf Oil Spill

This image taken from video provided by BP PLC at 17:56 CDT shows that oil has stopped flowing from the new 75-ton cap atop the site of the Deepwater...

Gulf Oil Spill

In this combo made from images taken from video provided by BP PLC, oil flows from two of three valves on the 75-ton cap atop the site of the Deepwat...

Gulf Oil Spill

This image taken from video provided by BP PLC at 15:13 CDT shows that oil has stopped flowing from the new 75-ton cap atop the site of the Deepwate...

BP said its capped-off well appeared to be holding steady Friday morning, almost midway into a white-knuckle waiting period in which engineers watched the pressure gauges for signs of a leak.
Results monitored from control rooms on ships at sea and hundreds of miles away at the company's U.S. headquarters in Houston showed the oil staying inside the cap, rather than escaping through any undiscovered breaches, BP PLC vice president Kent Wells said on a conference call.
Two underwater robots scoured the sea floor looking for signs of new leaks.
President Barack Obama said BP's capping of the spill was "good news" but cautioned that testing continued.
There was no evidence of a leak in the pipe under the sea floor, Wells said, one of the main concerns. Wells spoke 17 hours after valves were shut to trap oil inside the cap, a test that could last up to 48 hours.
He said pressure continued to rise inside the tight-fighting cap, a good sign that oil was not getting out somewhere else. The pressure was above the minimum they were hoping to see, but not yet in the high range they were hoping for.
"The pressures