As the river flowed past Vicksburg, it turned in sharply at the base of the cliff and then continued on to the Gulf of Mexico.

VOA: special.2009.11.19

Ed Schieffelin used the army's Camp Huachuca as a base for his search for silver.

VOA: special.2010.02.15

And the abolitionists might use Texas as a base for propaganda against the South.

VOA: special.2009.02.05

Each coral polyp releases a hard calcium carbonate skeleton that serves as a base.

VOA: special.2010.08.10

During saponification, an alkali base such as sodium hydroxide reacts with a fat.

VOA: special.2011.03.09

The base grows as more calcium carbonate is released.

VOA: special.2010.08.10

In many places, hay bales were used as a base to dump the snow on.

VOA: standard.2010.02.16

In a crowded community, the base is seen as land for new homes and businesses.

VOA: standard.2009.11.11

Then in September, two explosive-laden vehicles penetrated the base of the African Union peacekeeping mission in Somalia,known as AMISOM, resulting in the death of 17 peacekeepers.

VOA: standard.2009.12.05

Bereket told reporters, pro-government Somali militias have permission to use Ethiopia as a base of operations in attacking al-Shabab rebels, who control large sections of southern Somalia.

VOA: standard.2009.08.20

Although the revised plan involves anti-ballistic missiles installed at a former air base in Poland, defense experts say Moscow perceives the new project as less threatening to its security.

VOA: standard.2009.10.23

The man in the newly released video , is identified as Humam Khalil Abu-Mulal al-Balawi, who blew himself up inside a key U.S base in an eastern Afghan region bordering Pakistan.

VOA: standard.2010.01.09

The Bush plan, which Russia strongly opposed, would have placed 10 interceptor missiles in Poland and a radar base in the Czech Republic to intercept long-range missiles from such states as Iran.

VOA: standard.2009.10.23

But a majority don't think it is going to work in terms of being able to stop terrorists there from using Afghanistan as a terrorist base to do terrorists acts against the United States."

VOA: standard.2009.10.09

That same Quinnipiac poll also found that by a margin of 59 to 34 percent, Americans believe that preventing terrorists from using Afghanistan as a base of operations is still a worthwhile goal for the United States.

VOA: standard.2010.07.30

He said the main goal must be to prevent the country from again becoming a base for terrorist attacks on the United States as it was in 2001,which he said requires preventing the Taliban from returning to power.

VOA: standard.2009.09.22

Conscious that a faraway and costly war doesn't play well with voters, incumbent Gordon Brown insists the troops are fighting to keep Britain safe "We have got to be clear that we cannot allow terrorists to have territory in the world that then they use as a base to attack the United Kingdom."

VOA: standard.2010.04.30