Oscar and daughter Dulce pose for a snapshot. It was the family's first trip away from Framingham, Mass. They were anxious, Oscar said, in anticipation of the meeting with Tranquilino, who was arriving later by plane from Guatemala. Daughter Nicole, 7, stands by. (Torsten Kjellstrand for ProPublica)

Oscar's wife, Nidia Franco, adjusts Dulce's headband as the family prepares to head to Newark Liberty International Airport. "Oscar is such a good man. He always gives to other people," she said. "Now he gets something. It is good." (Torsten Kjellstrand for ProPublica)

Oscar gathers Nicole, Oscar Jr., 5, and Dulce in the museum’s main hall. (Torsten Kjellstrand for ProPublica)

Oscar holds his daughter Dulce as the family prepares to leave for the airport. (Torsten Kjellstrand for ProPublica)

Just before entering Newark airport, Oscar Jr. steps away from the group and has a moment to himself. At his feet a sign welcoming Tranquilino and others. (Torsten Kjellstrand for ProPublica)

Dulce sleeps while her parents and siblings await Tranquilino's arrival. (Torsten Kjellstrand for ProPublica)

As they hear that their grandfather's plane has landed, Andrea, 11, right, and Nicole look to spot their grandfather exit security. (Torsten Kjellstrand for ProPublica)

"I am very excited," Andrea Ramírez said as she waited. "But I'm a little nervous, too." (Torsten Kjellstrand for ProPublica)

The Ramírez children, Oscar Jr., Nicole and Andrea hold their homemade signs up high. (Torsten Kjellstrand for ProPublica)

Tranquilino Castañeda holds his grandchildren for the first time. (Torsten Kjellstrand for ProPublica)

Tranquilino and Oscar embrace. Until recently, neither knew the other existed. Tranquilino believed he had lost his wife and all nine children in a 1982 massacre by army troops in their home village Dos Erres. Oscar thought he was the son of an army lieutenant who abducted him after the attack but died months later in an accident. (Torsten Kjellstrand for ProPublica)

Nidia kisses Tranquilino on the cheek. (Torsten Kjellstrand for ProPublica)

Oscar and Nidia with Andrea, Nicole, Oscar Jr., Dulce and Tranquilino. (Torsten Kjellstrand for ProPublica)

Tranquilino holds his grandchildren close. (Torsten Kjellstrand for ProPublica)

Tranquilino with his hands on the shoulders of his only grandson, Oscar Jr. (Torsten Kjellstrand for ProPublica)

After their emotional reunion, the family piled into a van and head to New York City. Oscar, Oscar Jr. and Tranquilino sat together. (Torsten Kjellstrand for ProPublica)

Tranquilino shares a moment with grandson Oscar Jr. as his son looks on. (Torsten Kjellstrand for ProPublica)

Tranquilino leans on Oscar as he navigates the sidewalks of Manhattan. (Torsten Kjellstrand for ProPublica)

Tranquilino holds his grandchildren Oscar Jr. and Nicole. (Torsten Kjellstrand for ProPublica)