2 of 7: The Atari logo is seen on the facade of the Cira Center in Philadelphia on Friday April 19, 2013. Hundreds of built-in LED lights embedded in the north face of the Cira Centre were used to replicate the familiar paddles and ball of the classic Atari video game Pong, with gamers controlling giant, table-mounted joysticks across the Schuylkill River from the building. (AP Photo/Joseph Kaczmarek)

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