The anti-malarial drug Chloroquine was widely used until recent years when the malaria parasite became resistant to the drug.

VOA: special.2010.04.20

Last year, Selena Gomez became the youngest person to be named a United Nations Children's Fund Ambassador in the United States.

VOA: special.2010.10.08

Marie Curie became the first person to be awarded a second Nobel Prize in nineteen eleven, this time in chemistry.

VOA: special.2009.05.13

He became a lawyer. He moved to another northeastern state -- Massachusetts -- where he became active in Republican Party politics.

VOA: special.2010.12.23

At the same time, Mister Oppenheimer became chairman of the advisory committee to the United States Atomic Energy Commission.

VOA: special.2009.06.14

It carried the man who became the first human to step on the moon, Neil Armstrong, a former X-15 pilot.

VOA: special.2010.07.07

In July of nineteen sixty-nine he was almost speechless when Neil Armstrong became the first person to walk on the moon.

VOA: special.2009.08.16

Scientists believe large groups of wolves became stuck when they came to feed on animals already trapped in the asphalt.

VOA: special.2010.04.07

On May twenty-ninth, nineteen fifty-three, Edmund Hillary and Tenzing Norgay became the first climbers known to reach the summit of Everest.

VOA: special.2010.06.30

The American Le Mans Series became the first racing event to use the protocols in its Green Challenge competition.

VOA: special.2009.11.03

Soon after his death, Roberto Clemente became the first Latino player to be included in the Baseball Hall of Fame.

VOA: special.2010.04.11

I did not intend to fight unless it became necessary in self-defense and in the performance of official duty.

VOA: special.2010.02.15

She won. Barbara Jordan became the first black person to serve in the Texas Senate since eighteen eighty-three.

VOA: special.2010.05.09

He became a national hero to both black and white Americans because of his skill, bravery and restraint.

VOA: special.2009.04.05