TRAVERSE CITY, Mich. -- Five weeks ago, Jenn Gibbons set off on 1,500-mile solo rowing journey around Lake Michigan to raise money for breast cancer survivors, blogging along the way about life on the water. Police say someone following her well-chronicled voyage from a distance may have used the information to do her harm.A man broke in as Gibbons slept in the vessel's cabin, police say, and sexually assaulted her while the boat was moored along the shore in Michigan's Upper Peninsula.