"Even in a worst-case scenario accident, the sea provides a very high degree of dilution.

VOA: special.2011.03.16

So really at a worst-case scenario, with the volcano still going strongly, we could get airspace affected for the next few days."

VOA: standard.2010.04.17

Worst case scenario - this thing could keep going on for 90 days."

VOA: standard.2010.05.02

In the worst-case scenario it could take six months or longer,"

VOA: standard.2009.04.28

An expert on nuclear proliferation at the RAND Corporation in the United States, Brian Jenkins,says because of its proximity to Somalia and its close ties to the West, Kenya is vulnerable to the worst-case scenario, where an al-Qaida terrorist unleashes a "dirty bomb" in Nairobi causing the death of thousands.

VOA: standard.2009.05.01