Two - One to put it most of the way in, and one to give it an interesting twist at the end.
Blueit. -just thought of it, sorry its a little late to the party
They both can't make any change
One, although it's probably screwed in too tight anyway.
less than twelve parsecs.
The way they pronounce "unionized"
You take the s out of safe and the f out of way!
On a plane.
This is the end.
Two: one to get it 95% done, and the second to give it the twist at the end.