Boston Marathon will be special for Australian couple on their 50th wedding anniversary

Peter and Kerry Geraghty, a married couple from Brisbane, Australia, plan to run the Boston Marathon together as they mark their 50th wedding anniversary; race weekend includes the Marathon Expo, Fan Fest, and an annual security briefing ahead of Monday's start.

The Boston Marathon takes place in days and runners from around the world are arriving in Boston for race weekend. The Marathon Expo opens Friday at the Hynes Convention Center, where participants will pick up race numbers and visit vendors. Fan Fest opens at Boston City Hall Plaza at 3 p.m., and the finish line will be open to the public at that time. Among those attending are Peter Geraghty, 76, and his wife Kerry, 73, from Brisbane, Australia, who plan to run the race as part of their 50th wedding anniversary. Key details: - The Marathon Expo at the Hynes Convention Center opens Friday and is the site for bib pickup and vendor exhibits. - Fan Fest opens at Boston City Hall Plaza at 3 p.m., and the finish line area will be available for public photos at the same time. - Peter Geraghty, 76, and his wife Kerry, 73, have run a combined 36 marathons but have never run Boston; they said they will run together, though not hand-in-hand. - Peter described the Boston Marathon as "the most prestigious marathon in the world," reported to WBZ-TV, and said the race coincides with their 50th wedding anniversary. - Local, state and federal officials will hold their annual news conference on security on Friday to outline public safety and medical preparations. - The Boston Marathon starts just after 9 a.m. Monday in Hopkinton, Massachusetts, follows a 26.2-mile course through several towns and ends on Boylston Street; this is the 130th running of the race. Summary: Peter and Kerry Geraghty's participation is one of many personal stories among international runners converging on Boston for race weekend. Officials will brief the public on security and medical preparations on Friday, and the race begins Monday morning in Hopkinton.