What really transformed the United States was the process by which four million slaves were freed that necessitated a recrafting of our Constitution."

VOA: special.2011.04.09

"We also carefully consider the sources of exposure of populations to radiofrequency electromagnetic fields, the nature of these fields as they come from various devices, including wireless phones, and we look carefully at the physical phenomenon by which exposure to such fields may perturb biological systems and lead to cancers."

VOA: special.2011.06.06

"I really cannot give you an answer in terms of a definitive date by which we are going to be done,"

VOA: standard.2009.09.15

There's another path by which they can learn about accelerators and particle detectors essentially, how do we know any of this.

VOA: standard.2010.03.05

The North also said it had reached the final stage of a uranium enrichment program, possibly creating a second process by which it can build nuclear arms.

VOA: standard.2009.09.06

"It is a bilateral program by which now ICE is redirecting criminals, Mexican nationals, away from Juarez, and they are being sent to Laredo, Eagle Pass and Del Rio,Texas."

VOA: standard.2010.04.01

While he acknowledges that there is much to be learned from alternative research methods like cell culture a process by which cells are taken from a living organism and grown under controlled conditions VandeBerg says they have learned a lot more from research on chimpanzees.

VOA: standard.2010.02.16

The study was partly supported by Vibram, which makes a kind of footwear that it says is like running barefoot.

VOA: special.2010.02.03

In nineteen forty, Clare Boothe Luce traveled to Europe as a reporter for Life magazine, which was published by her husband.

VOA: special.2010.08.08

The idea behind microfinance is to empower borrowers by helping them build a business which can create income and grow.

VOA: special.2010.06.16

Hires is now owned by the Dr Pepper Snapple Group which also sells other brands of root beer.

VOA: special.2011.08.01

People over sixty-five are covered by the Medicare insurance program which the government created in nineteen sixty-five.

VOA: special.2010.03.24

The team made the discovery by measuring the speed at which our galaxy is moving through space.

VOA: special.2009.01.20

The company is mostly owned by the United States government which has invested billions of dollars.

VOA: special.2009.10.09