Pictures Most Memorable April Fools Pranks April 1, 2011 / 12:42 PM CDT / CBS News (credit: NASA/Newsmakers) Va-Caisse-Ion (credit: Jupiter Images) Short Attention Span Radio (credit: Jupiter Images) Yo Quiero Liberty Bell (credit: Don Murray/Getty Images) Guinness Mean Time (credit: Jeff J. Mitchell/Getty Images) Porky Bickar's Flaming Tires (credit: JONATHAN UTZ/AFP/Getty Images) Leftie Whoppers (credit: ROBYN BECK/AFP/Getty Images) Drinking And Computing (credit: Mario Tama/Getty Images) A Lean Too Far (credit: FABIO MUZZI/AFP/Getty Images) Wis. Capitol Explosion (credit: Justin Sullivan/Getty Images) R.I.P. Bill Gates (credit: RAVEENDRAN/AFP/Getty Images) Backtimed Gmail (credit: CBS) Metric Clocks (credit: AP) Dorothea Lange (credit: Library of Congress) Election Deathmatch (credit: CBS) Ely, Minnesota (credit: Ely Chamber Of Commerce) The Mayor's Dead (credit: AP) Pi (credit: CBS) South Park (credit: Comedy Central) Spaghetti Tree (credit: AP) Smell-O-Vision (credit: AP) The Finger (credit: CBS) Virgle (credit: CBS) Wheel Of Fortune (credit: CBS)