It’s been around since 1897, inspired by the success of the first modern-day marathon competition in the 1896 Olympics. Now, when runners and spectators gather for next month’s Boston Marathon, security will be much tighter than it was last year when bombs killed three people and injured more than 260. Officials say spectators attending the event with backpacks, coolers and other large items, may have to have them searched. At least 35-hundred police officers will be spread across the marathon path, which runs through eight cities and towns.