One of the more difficult walks is an eight kilometer hike that is not for anyone afraid of high places.

VOA: special.2009.04.15

Police say one thing that makes discussion of this law difficult is that many critics have not read the law.

VOA: special.2010.07.03

The report says Pittsburgh was forced to make many of the difficult decisions that other cities are facing now.

VOA: special.2009.07.13

He felt that punishing Davis would only create more bitterness and make reconstruction the rebuilding of the South more difficult.

VOA: special.2010.01.14

He said later that he did so because he was finding it difficult to bring up the question of surrender.

VOA: special.2009.12.24

They created more than fifteen thousand paintings and sculptures designed to lift the spirits of Americans during a difficult time.

VOA: special.2009.03.23

He says the actively changing nature of the Internet makes it difficult to stay current in studying its effects.

VOA: special.2010.01.28

And I feel like having dealt with adversity really helps me to lead a group of men through difficult times as well."

VOA: special.2010.06.02

He said the most difficult period of the trip was crossing the Yukon Arctic and the Arctic National Wildlife Refuge in Alaska.

VOA: special.2011.03.23

This makes it more difficult for the body to effectively use the same amount of oxygen as it would on the ground.

VOA: special.2009.07.14

Early identification of the disease may be difficult because many infected people do not show any immediate symptoms.

VOA: special.2010.01.04

When they reached New Guinea, they were about to begin the most difficult part of the trip.

VOA: special.2010.05.26

The most difficult national problem facing the administration of President Franklin Pierce was the situation in Kansas.

VOA: special.2009.05.07

Learning about the existence of these HeLa cells was an emotional and difficult experience for the family.

VOA: special.2010.07.21