How Lethal Injection Works
Covers preparation, witnessing and administering the execution, and a look at the U.S. states and countries around the world employing the method. From Howstuffworks.com.
Wikipedia: Lethal Injection
Encyclopedia article defining the form of capital punishment by lethal injection that gained popularity in the 20th century as a more humane form of execution. It intended to supplant methods such as electrocution, hanging, execution by firing squad, and decapitation.