As you can see, my young apprentice, your friends have failed. Now witness the firepower...

The Emperor: [In the throne room, Luke is watching the Imperial fleet attack the Rebels from the huge throne room window] As you can see, my young apprentice, your friends have failed. Now witness the firepower of this fully ARMED and OPERATIONAL battle station! [the Emperor hits the comlink switch on his throne] The Emperor: Fire at will, Commander! Moff Jerjerrod: [In the Death Star's firing room, a group of hooded Imperial gunners starts priming the Death Star's superlaser - a device so advanced it can be trained on capital ships, such as the Rebel aircraft carriers. A series of tones signify that the weapon is ready] Fire! [a second gunner hits a switch, and a huge laser beam roars down a firing shaft. The outer surface of the Death Star shows a huge laser dish start to develop, and then a titanic laser beam moves out from the Death Star's superlaser. It hits the Rebel Calamari Cruiser 'Liberty' and vaporizes the huge carrier in less than a second]