![Fort Knox doesn't have
a secret physics lending library.
Fort Knox doesn't have
a secret physics lending library.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Fort Knox doesn't have
a secret physics lending library.
The Big Bang Theory Season 8, Episode 20
![Leonard, don't you wanna see
the inside of the fort?
Leonard, don't you wanna see
the inside of the fort?](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Leonard, don't you wanna see
the inside of the FORT?
The Big Bang Theory Season 8, Episode 20
![What are we doing? This is a fort.
Let's sit on the floor.
What are we doing? This is a fort.
Let's sit on the floor.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
What are we doing? This is a FORT.
Let's sit on the floor.
The Big Bang Theory Season 8, Episode 20
![of who's allowed in his
tree fort if fe ever gets one.
of who's allowed in his
tree fort if fe ever gets one.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
of who's allowed in his
tree FORT if fe ever gets one.
The Big Bang Theory Season 7, Episode 6
![But like the flag over
Fort Sumter, I'm still here.
But like the flag over
Fort Sumter, I'm still here.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
But like the flag over
Fort Sumter, I'm still here.
The Big Bang Theory Season 5, Episode 14