Her disappearance touched off a search by more than 400 rescue workers.

The dismissal touched off demonstrations and marches, mostly by white residents.

The decision touched off a demonstration by several hundred thousand people on July 1.

An argument over the dog's action touched off an exchange of 20 shots, by two brothers from each family, the police said.

Traders noted that when platinum rose above $540 it touched off computer buying by a number of funds.

The ruling touched off an outburst in court by the mother of one defendant.

A worse risk, some conservationists say, is that the military's withdrawal may touch off land grabs by developers.

However, the ensuing fire touched off by the earthquake reached almost to the Mission's doorstep.

That touched off protests by parents of the children he coached.

Harlem riot touched off by police killing of a young black boy.