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Gabby Giffords - what an inspiration! It took so much courage to stand up to the man who forever changed her life. We can all draw strength from this amazing woman.

Corporal Patrick Daniel "Pat" Tillman(11/6/76-4/22/04) American football player left his professional career & enlisted in the US Army in 6/02 in the aftermath of 9/11. He joined the Army Rangers & served several tours in combat before he died in the mnts of Afghanistan. The Army 1st reported Tillman was killed by enemy fire & Lt General Stanley A. McChrystal approved the award of a Silver Star. The actual cause of Tillman's death was later ruled by the Pentagon as friendly fire.

Ronald Reagan is shot, 1981 © Michael Evans / Courtesy of Ronald Reagan Library.

Iraqis watch a statue of Saddam Hussein fall in Baghdad

Operation Desert Storm

Osama bin Laden: What now?

Space Shuttle Columbia. After a successful two-week mission the Space Shuttle Columbia was lost on re-entry (the moment a spacecraft re-enters Earth’s atmosphere), along with seven astronauts onboard.

Jared Loughner was arrested in January 2011 for allegedly killing six people and wounding 14 others, including Rep. Gabrielle Giffords during a shooting spree outside a Safeway supermarket in Arizona while the congresswoman was meeting with constituents. Loughner, 22, posed for the above mug shots taken by the United States Marshals Service when he appeared in U.S. District Court in Phoenix.

PHOTO: This April 28, 1999 file photo shows an unidentified woman with 15 crosses posted on a hill above Columbine High School in Littleton, Colo. on April 28, 1999 in remembrance of the 15 people who died during a school shooting on April 20.

rachel scott: she was killed in the 1999 columbine shooting for admitting she loved god. even though people have forgotten her and her bravery, she still inspires me.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, kiss as Bridesmaids Grace Van Cutsem and Margarita Armstrong-Jones look on from the balcony at Buckingham Palace in London after the Royal wedding April 29, 2011. (Peter Macdiarmid/Getty Images

Death of Osama bin Ladan.

The space shuttle Discovery, riding atop a NASA 747 transport jet, does a final fly-by over the White House as tourists an Washingtonians watch and take pictures in Washington, April 17. Discovery will go on display at the National Air and Space Museum's Udvar-Hazy Center.