A Mexican drinks his beer, suddenly throws his glass in the air, pulls out his pistol, and shoots the glass to pieces. He says, "In Mexico our glasses are so cheap we don't need to drink from the same glass twice."
An Iraqi, obviously impressed by this, drinks his beer, throws his glass into the air, pulls out his AK-47, and shoots the glass to pieces. He says, "In Iraq we have so much sand to make glasses that we don't need to drink out of the same glass twice either.
The American girl, cool as a cucumber, picks up her beer and drinks it, then throws her glass into the air, pulls out her gun, shoots the Mexican and Iraqi, catches her glass, and says, "In America we have so many illegal Mexicans and Arabs that we don't have to drink with the same ones twice.