Work partners Jon Chintanaroad (left) and Mike Prestano are all smiles now, but founding a tech startup together threatened their friendship — and their business. April Dembosky/KQED hide caption

itoggle caption April Dembosky/KQED

Carlton Scott pays $266.99 per month for his subsidized health insurance plan. He worries he and his neighbors would lose their insurance without the subsidy. Jeff Cohen/WNPR hide caption

itoggle caption Jeff Cohen/WNPR

Martha and Alvaro Galvis used to travel from New Hampshire to Boston to watch the marathon every year. Both were hurt in the bombing two years ago. Jesse Costa/WBUR hide caption

itoggle caption Jesse Costa/WBUR