Killed on daughter's second birthday.
Jim Walsh went to work in the World Trade Centre last Tuesday while his pregnant British wife Kate, his daughter Caroline and his fatherin-law prepared to go on a family outing to the zoo.
But the trip was abandoned when Mrs Walsh, originally from Gedling, Nottingham, got a telephone call telling her there had been an accident and to turn on the television.
Mrs Walsh - who is pregnant with the couple's second child - then watched with her father Tony Webster as the dreadful events of last Tuesday unfolded, knowing her husband was inside the twin towers.
Mr Webster said his daughter was coming to accept that her husband was almost certainly killed in the attack, and that her second child would never see him.
Mr Webster, 57, of Settle, North Yorkshire, said, "It was my granddaughter Caroline's second birthday so we were going to go to the zoo.
"But Kate's brother-in-law rang and said there had been an accident and to turn on the television, and that's how she found out.
"She's coping astonishingly well, but I think we are just assuming that Jim's not coming home now. The company has not heard from anybody at all who was working in his area."
Mr Walsh, 37, a computer programmer, was one of 1,000 employees working for E-Speed, a branch of Cantor Fitzgerald, on the 104th floor of the north tower of the World Trade Centre, which was the first to be hit.
Some 700 of the company's staff were feared killed in the attack and Cantor chief executive Howard Lipnick said last week that the only reason he wanted to continue in business was to support the 700 families involved.
Mr Webster said his daughter, 29, an actuary, was due to give birth to the couple's second child at the end of March.
"We will keep her going, " he said, adding that the pair had met while Kate was working as an au pair in America in 1994 and had settled in Scotch Plains, New Jersey.
"He was a fine young man, very popular, with a lot of close friends.
He was very caring."
Mrs Walsh said her worst moment had come when her daughter Caroline was celebrating her birthday on Tuesday night, while her uncle searched the city's hospitals, trying to find the two-year-old's father.
"Caroline blew out the candles on her cake, and her daddy wasn't home, " she said.