11 of 13: Zac Sunderland, who sailed around the world at age 17, wishes his sister Abby Sunderland, good luck outside their home Thousand Oaks, Calif., on Thursday, June 10, 2010. Abby Sunderland, 16, who was attempting a solo sail around the world, was feared in trouble Thursday in the frigid, heaving southern Indian Ocean after her emergency beacons began signaling and communication was lost. (AP Photo / Damian Dovarganes)

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