1.   Critics of voucher programs say they are a reckless experiment that siphons money from public schools as well as a dangerous breach of the separation of church and state.

2.   In one posting, for example, McDermott recalled a reckless experiment with sodium and potassium he and friends had conducted while in college.

3.   The design and construction of the reactor, and the reckless experiment that led to the explosion, exposed the failures of Soviet technology.

4.   Eight months later, a man who barely knew Neel is accusing him of killing many hundreds of people in a reckless medical experiment.