Three hours later, NASA officials told the crew that everything was "OK" for what they called TLI, or trans-lunar injection.

VOA: special.2009.07.08

But experts generally advise against using the drug if more than three hours have passed after the first signs of a stroke.

VOA: special.2009.09.22

It will result in head pain, stomach problems and a feeling of tiredness after two to three hours.

VOA: special.2010.02.02

He says just choosing a jury even for the simplest trials can often take two or three hours.

VOA: special.2009.08.31

But traditional guidelines say not to use tPA if more than three hours have passed after the first signs of a stroke.

VOA: special.2009.08.12

It took the astronauts more than three hours to complete the preparations for leaving the lander.

VOA: special.2009.07.15

Faisal Shahzad was quickly identified and arrested fifty-three hours after the attempt in Times Square.

VOA: special.2010.05.08

Some studies have failed to produce clear evidence to support treatment after three hours.

VOA: special.2009.09.22

He reduced the long story into an opera that lasts about three hours.

VOA: special.2010.06.11

More than four-thousand shells had been fired during the thirty-three hours of fighting.

VOA: special.2009.08.13

Three hours after leaving New Guinea, Amelia sent back a radio message.

VOA: special.2010.05.26

The Virginia and the Monitor fought for three hours.

VOA: special.2009.09.10

It made the trip in twenty-three days, twenty-three hours.

VOA: special.2010.04.26

After three hours, Admiral Montojo surrendered.

VOA: special.2010.07.15