Igor Sikorsky often said: "The work of the individual still remains the spark which moves mankind ahead."

VOA: special.2010.09.10

Someone just needs to give them a little spark." More than 50,000 children die each year in Yemen because of diseases caused by water pollution.

VOA: standard.2010.04.01

A rash of home mortgage defaults helped spark last year's financial meltdown.

VOA: standard.2009.08.25

Nor did the Pill spark the sexual revolution of the 1960s.

VOA: standard.2010.05.12

His trip comes at a critical time with the results of the country's presidential election still uncertain and worries a disputed outcome, due to allegations of widespread ballot box stuffing, could spark further civil violence.

VOA: standard.2009.09.04