16-year-old sailor is the youngest person to do so
                                
                                
                                    (Newser) -
                                    After 210 days at sea, 16-year-old Australian Jessica Watson sailed into Sydney Harbour today to complete her solo and unassisted circumnavigation of the globe. She's the youngest person ever to make such a trip.  Australia's ABC reports  that thousands of cheering locals crowded the shore to welcome Watson, who, after...