11.   History sometimes has a curious way of lying dormant before the right spark ignites attention and touches off wide reverberations.

12.   Instead, I was watching the bidders, looking for whatever spark ignites inside these men, turning a hobby into a full-bore obsession.

13.   Jeffers was grinding the vehicle identification number off a stolen vehicle when a spark ignited the illegally built Brooklyn garage, law enforcement sources said.

14.   Once the tank is perforated, an errant spark can ignite the fumes, which are highly flammable and can quickly engulf anyone inside.

15.   The explosion apparently occurred when a spark ignited grain dust suspended in the air.

16.   A stray spark apparently ignited cooking gas that had leaked from tanks and collected in a basement restaurant, they said.

17.   A welding spark ignited oil spilled nearby in the engine room, MBC said.

18.   Because Columbia was still in the atmosphere -- and not in the vacuum of space -- when the short happened in the cargo bay, sparks could have ignited.

19.   Electricity to the Morasha junction north of Tel Aviv was cut for fear a spark could ignite the gas, police said.

20.   Investigators believe the fire broke out when leaking oil was ignited by sparks from welding equipment being used to expand the production platform.