Two people who lost limbs in the 2013 bombings at the Boston Marathon finish line are running this year's race. Both are on their way from Hopkinton to Boston as part of the mobility-impaired division in Monday's 120th running of the venerable marathon. Haslet is a professional ballroom dancer running to raise money and awareness for Limbs for Life, a charity that provides expensive prostheses to low-income amputees.