2nd Annual First Responder Challenge The 2nd Annual First Responder Challenge powered by National Grid will take place Sunday, January 28, 2018, at TD Garden. This one-of-a-kind event invites local first responders and fitness enthusiasts from all over New England to participate in a course throughout TD Garden and offers friends and families a day filled with activities and fun. The event takes place to raise awareness around health and wellness and to support The 100 Club of Massachusetts, a charity that supports the families of law enforcement officers and firefighters who are killed in the line of duty. Cambridge Firefighters Local 30 will have a team competing in the event. Please support us in this great cause.