But the report says the devices should be used only when necessary.

VOA: special.2010.05.25

These include lasers, noise makers and,when necessary, killing problem animals.

VOA: special.2009.04.01

Main said the government is now willing to go directly to court to shut down mines when necessary, and he called on Congress to enact tougher enforcement measures.

VOA: standard.2010.04.27

Some cesareans are medically necessary. But in other cases, women just want the convenience of knowing when they will give birth.

VOA: standard.2010.06.30

President Obama, who had set an early August deadline, now predicts necessary action in September when Congress returns from a month-long recess.

VOA: standard.2009.07.29

The president also says he will send the military into battle only when needed, and will give them the necessary training and equipment.

VOA: standard.2009.05.23

"That is why I will send our servicemen and women into harm's way only when it is necessary and ensure that they have the training and equipment they need when they enter the theater of war,".

VOA: standard.2009.05.23

Speaking via Skype,she says no. "I think further studies will be necessary to show whether the differences we've demonstrated depending on delivery mode of babies when they first emerge into the world actually carry over time, and whether those differences might contribute to health outcomes."

VOA: standard.2010.06.30

"It is a promise that as long as I am your Commander in Chief, I will only send you into harm's way when it is absolutely necessary, and with the strategy, the well-defined goals, the equipment and the support you need to get the job done,"

VOA: standard.2009.05.22