William Wilhelmi says being a potter can be difficult.

VOA: special.2009.09.09

Because the tunnel economy is clandestine, it's difficult to estimate just how much money is being made.

VOA: standard.2010.06.17

"Being physically active on a regular basis is a difficult thing, but the MyActivity Pryamid offers adults a variety of ways that they can reach these recommendations for health and improving the quality of life."

VOA: standard.2010.02.26