Former U.S. Vice presidential candidate and Alaska Governor Sarah Palin (R) greets some of the thousands of motorcycle enthusiasts and military veterans participating in 'Rolling Thunder' rally May 29, 2011 in Arlington, Virginia. Although not an official guest, former U.S. Vice presidential candidate and Alaska governor Sarah Palin is expected to participate in today's motorcycle parade from the Pentagon to the National Mall.

Todd Palin adjusts the strap of the motorcycle helmet of his wife, former U.S. Vice presidential candidate and Alaska Governor Sarah Palin.

Isaiah, a 10-year-old Chihuahua dressed as Gen. George Patton and owned by Buddy Sours of Browntown, Virginia.