By JULIUS WHIGHAM II | Palm Beach Post | Published: April 8, 2021 JUPITER FARMS (Tribune News Service) Standing on a vacant lot in Jupiter Farms, retired U.S. Army Sgt. Justin Callahan surveyed the location that in a few months will be his family s new home. Through a program designed to help wounded veterans, a specially adapted home is being built for Callahan, who lost his left leg in an explosion 17 years ago while serving in Afghanistan. The house is being provided mortgage-free through Homes For Our Troops, a publicly funded nonprofit that builds and donates specially adapted homes to severely injured post-9/11 veterans.