Americans know about them mainly from a history of use as pack animals in Arizona and other areas of the desert Southwest.

VOA: special.2010.02.16

one of the soldiers said to Smith. "You'll never be able to walk all those miles with that heavy pack on your back."

VOA: special.2009.12.12

Seth helped John pack his fur and traps so he could carried them on his back.

VOA: special.2010.06.26

Farmers often hired immigrant workers from Asia and Mexico to plant, harvest and pack these foods.

VOA: special.2010.01.11

By late afternoon, John's legs hurt and pack on his back was very heavy.

VOA: special.2010.06.26

He saw them,and kneeling down he pulled from his pack three huge,red apples.

VOA: special.2009.12.12

His face was hidden by a large pack on his back.

VOA: special.2009.12.12

But burros are not only good pack animals.

VOA: special.2010.02.16

"Pack up,Ma!" he cried.

VOA: special.2009.11.28

Cigarette taxes are a vital revenue source for New York State, which has the highest-priced cigarettes in the nation - almost $15 a pack.

VOA: standard.2010.08.11

Then they transport them to states where the price of a pack is higher.

VOA: standard.2010.08.11

The only evidence is a battery pack and a power line on his side.

VOA: standard.2010.01.27

The price of a smoke varies widely across the United States, because each state sets the tax imposed on the retail sale of a pack of cigarettes.

VOA: standard.2010.08.11

So we had to take the engine pack out and replace it."

VOA: standard.2010.08.01

We meet,we talk about what the hike is for the day, and then they pack their backpacks and we head out the door - no matter what the weather."

VOA: standard.2010.06.25