Answer:
If a plane crashes on the border of US and Canada where do they bury the survivors?
I get wet when drying. I get dirty when wiping.
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
Who makes it, has no need of it. Who buys it, has no use for it. Who uses it, can't see it. What is it?
Why did the computer keep sneezing?
What did the piece of wood say when he saw the screwdriver and screws approaching?