1.   In the middle of the night, the hours of vulnerability, the gas apparently began to steal into the apartments.

2.   Radioactive gases began seeping into the reactor core.

3.   The muds also help control pressure as rock is removed and the oil and gas begins to seep forward.

4.   Though the valve was then closed, the seal was not tight and nitrogen gas began forcing out the cooling water.

5.   But gas began gushing out from several places around the mouth of the well and a huge explosion triggered the blaze.

6.   Gas began trickling into the city Tuesday, but experts still had to test for leaks, said U.N. official William Eagleton.

7.   Gas began to leak from the tanker.

8.   Russian gas began flowing toward Sarajevo Tuesday and electricity lit up part of the city.

9.   Russian gas began lighting up parts of Sarajevo Tuesday, prompting the Bosnian government to say a delayed cease-fire might take effect within hours.

10.   The gas began flowing in January.