That is because the force of the object hitting Jupiter pushed very reflective particles high into the planet's atmosphere.

VOA: special.2009.08.25

But he said McClellan was a good organizer who could build the defeated army into a strong force.

VOA: special.2009.09.24

If the Union force attacked before Stonewall Jackson got into position, Lee could not possibly hold it back.

VOA: special.2009.10.15

It settles into a long, powerless slide toward the landing field at Edwards Air Force Base.

VOA: special.2010.07.07

The group notes that a past fishing treaty took almost ten years to come into force.

VOA: special.2009.12.08

Mister Germont, the head of the Paris police force, came into the room.

VOA: special.2009.12.26

With traditional CPR, you give two breathes to force air into the lungs.

VOA: special.2009.06.09

In his first days in office, he signed an order to do so, and appointed a task force to look into details.

VOA: standard.2009.05.20

Samaranch is considered the driving force behind turning the Olympic Games into a popular, commercial,and global event.

VOA: standard.2010.04.21

And as Europe's labor force ages and fewer Europeans are born, Lemaitre predicts governments will be pressured into opening their doors to more immigrants.

VOA: standard.2010.01.20

"I have agreed in principle to a new British force level of 9,500, which will be put into effect once these conditions are met,".

VOA: standard.2009.10.14

"The reason the unemployment rate rocketed it up, is because the improving employment conditions are drawing more and more job applicants into the labor force,"

VOA: standard.2009.11.06

Before the Convention on the Rights of the Child came into force in 1989, most of the world thought children should be seen and not heard.

VOA: standard.2009.10.08

The START-1 treaty was negotiated in the 1980s,signed by U.S.President George Herbert Walker Bush and Soviet President Mikhail Gorbachev in 1991,and came into force in 1994.

VOA: standard.2009.04.08

Two vehicles entered and then exploded in the African Union peacekeeping force compound, sending a heavy trail of black smoke into the skyline of the capital city.

VOA: standard.2009.09.17

All 27 EU members must ratify it before it can come into force.

VOA: standard.2009.10.02

On the other hand Wal-Mart has gone through a tremendous effort over the last couple of years to integrate environmental sustainability into not only its own practices but to force this into the supply chain."

VOA: standard.2010.01.23

Authorities are taking no chances. Although they have announced there will be no red zone, an alcohol ban will come into force starting Tuesday in the center of Rome and the area surrounding the stadium.

VOA: standard.2009.05.26

"In fact,the launching of the convention and the opening of the convention for signatures attracted 17 signatures this morning, and this is very encouraging as far as we are concerned so we are definitely very hopeful that this convention will enter into force sooner."

VOA: standard.2009.10.23

Authorities say they quickly killed two of the gunmen, but two others continued to fire machine guns in the extended battle in Pul-i-Alam, Witnesses say U.S.military helicopters were part of the response force, and one aircraft fired a rocket into a multi-story building which the insurgents had seized, used to launch their attack and had rigged with explosives.

VOA: standard.2009.08.10