The body of Marine Capt. Nicholas Losapio has returned home to his native New Hampshire, escorted to a funeral home in Wolfeboro.The 31-year-old was killed in a training exercise in California earlier this month.Losapio was known as Nick to family and friends and went by the call sign "Sloppy" as an active-duty pilot.Losapio's remains arrived at Logan International Airport just after noon Tuesday, accompanied by Massachusetts state troopers, as well as state and local New Hampshire police and sheriff's deputies for the ride north.On overpasses along I-95, first responders and members of the public stopped to pay their respects."It's fitting that you see public servants out here, standing at attention and being here to honor a fallen Marine," said Portsmouth Assistant Fire Chief Bill McQuillen.Losapio and four other Marines were killed June 8 in a training exercise in the California desert. Among those watching the escort was the family of Army Warrant Officer David Plasch, who was killed in Operation Desert Storm in 1991. "It's to honor the family and know that we support them as well, because it's hard," said Karen Riley, Plasch's sister. "Something like this is really difficult.""It brings back a lot of memories and makes you very proud of who they are, what they've done for our country, the sacrifices," said another sister, Lynn Ross.According to his obituary, Losapio was happiest when he was flying. He grew up in Kensington and attended Exeter High School and Norwich University. He was commissioned as a Marine Corps officer after graduation and fulfilled his dream of becoming a pilot. He flew three combat missions in three overseas deployments."He was someone's son, and he was someone's brother, and it's a loss, for our freedom and our country," said Kensington Police Chief Scott Cain.According to his obituary, Losapio is remembered for his infectious smile and outrageous laugh. A celebration of life with full military honors is scheduled for July 9.