How do you use the word flaw in a sentence?

Flaw:noun: a small often hidden defect; anything that does not work as intended.
verb: to make or become defective.

Example sentence:

1. The space shuttle Challenger exploded during liftoff due to a fatal flaw in an O-ring on the solid rocket boosters.
2. There was a flaw in the heating unit.
3. The computer contained a security flaw that had to be fixed.
4. The prosecutor found a flaw in the defendant's statement.
5. The teacher passed out a worksheet and asked the students to find a flaw within each sentence.