Politics

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Former President George W. Bush rode with 14 veterans during the third annual Warrior 100K ride this past weekend through rough terrain near Waco, Texas. (George W. Bush Institute)

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Motorcycles drive over the Memorial Bridge during the annual Rolling Thunder "Ride for Freedom" parade ahead of Memorial Day in Washington, Sunday, May 26, 2013. (AP Photo/Molly Riley)

Motorcycles drive past the Lincoln Memorial as Colin Morris, of the US Army, salutes during the annual Rolling Thunder "Ride for Freedom" parade ahead of Memorial Day in Washington, Sunday, May 26, 2013. (AP Photo/Molly Riley)

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Motorcyclists ride across Memorial Bridge into Washington during the annual Rolling Thunder "Ride for Freedom" parade ahead of Memorial Day Sunday, May 26, 2013. (AP Photo/Molly Riley)

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Motorcycles ride near the Lincoln Memorial during the annual Rolling Thunder "Ride for Freedom" parade ahead of Memorial Day in Washington, Sunday, May 26, 2013. (AP Photo/Molly Riley)

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Police officers lead the way for the motorcyclists, many of whom are veterans, across the Memorial Bridge into Washington during the annual Rolling Thunder "Ride for Freedom" parade Sunday, May 26, 2013, ahead of Memorial Day celebration in Washington. (AP Photo/Molly Riley)

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Motorcycles drive over the Memorial Bridge during the annual Rolling Thunder "Ride for Freedom" parade ahead of Memorial Day in Washington, Sunday, May 26, 2013. (AP Photo/Molly Riley)

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Motorcyclists ride across the Memorial Bridge into Washington Sunday, May 26, 2013, during the annual Rolling Thunder "Ride for Freedom" parade ahead of Monday's Memorial Day celebration. (AP Photo/Molly Riley)

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Motorcyclists right across the Memorial Bridge into Washington Sunday, May 26, 2013, during the annual Rolling Thunder "Ride for Freedom" parade ahead of Memorial Day. (AP Photo/Molly Riley)

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Motorcycles drive over the Memorial Bridge during the annual Rolling Thunder "Ride for Freedom" parade ahead of Memorial Day in Washington, Sunday, May 26, 2013. (AP Photo/Molly Riley)

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Motorcycles, many of whom are veterans, ride across the Memorial Bridge during the annual Rolling Thunder "Ride for Freedom" parade ahead of Memorial Day in Washington, Sunday, May 26, 2013. (AP Photo/Molly Riley)