Jason Boyer, top left, and Jennefer Boyer, right, of Sammamish, Wash., arrive Wednesday at Dulles International Airport from Congo with their newly adopted sons, Andre, 6, left, and Luke, 4, right. (J. Lawler Duggan/For The Washington Post)

When Jennefer Boyer learned that her son Luke had contracted malaria, she did what any mother would: She rushed to be by his side.

In her case, that meant leaving her husband and two biological daughters in Seattle to spend nine months in Congo, where her two adopted sons, 4-year-old Luke and 6-year-old Andre, had been waiting two years to come to their new home.

On Wednesday, they finally made it.

United Flight 951 carried three new U.S. citizens across the world — Boyer’s sons and Isaac Sands, 12, whose adoptive parents, Jennifer and Eric Sands of central Illinois, stood in the arrivals area at Dulles International Airport waiting to hug him.

“It’s time. It’s time,” Jennifer said, close to tears, as she glanced over every person coming out of customs, waiting for one to be Isaac.

Eric Sands of Illinois hugs his newly adopted son, Isaac, 12, as Isaac arrives at Dulles International Airport from Congo. (J. Lawler Duggan/For The Washington Post)

Boyer and the Sandses are the lucky ones. They are among about 1,200 families — a third of them American — who adopted children from the Congo only to be hit by a Congolese government freeze on granting the children exit letters. That was in September 2013, and many have been waiting ever since.

Then, last week, Congo announced that it had completed its review of finalized adoption cases and would authorize the departure of 69 children to eight countries. Fourteen of the children were adopted by U.S. families.

The rest hope that Wednesday’s homecoming was a sign of things to come.

Julie Renee Massie and her husband, Chris, of Richmond, already had a biological son, who is now 7, when in January 2013 they were matched with Esther, who is about a year younger than their son.

The process was supposed to take just six months — nothing in the world of international adoptions, where years can pass between applying and actually bringing a son or daughter home.

“We did a lot of research on the countries that you could adopt from, and at the time, the Democratic Republic of Congo seemed best,” Julie Massie said. The freeze on exit letters came just as their six-month wait should have ended.

Massie, who is also awaiting exit papers for a 3-year-old adopted son in Congo, was at Dulles Airport on Wednesday to greet the arrivals, as were several other families whose children are still in Congo. Some families who adopted children from Congo before the freeze were there, too. Some of their children were excitedly running around in African-patterned attire — one was wearing a Congolese soccer jersey.

A teary Jennifer Sands of Illinois, left, embraces Jennefer Boyer of Sammamish, Wash., right, as Boyer arrives at Dulles International Airport with Sands's adopted son. (J. Lawler Duggan/For The Washington Post)

They gathered in the international arrivals area, coloring welcome posters while they waited for the three new Americans to get through customs.

Finally, someone shouted, “They’re here!” The Sandses and their son and three daughters — two adopted, two biological — raced up and threw their arms around Isaac.

Isaac was all smiles when the family of seven shared a long, long hug, surrounded by flashing cameras and cheering supporters. He held his mother’s hand as he walked toward the crowd, whispered to her and giggled. He showed his family his water bottle — “I get it from the airplane” — and told them that he watched a movie during the flight.

Boyer walked out with Andre and Luke, who nine months ago had been so malnourished and weak after his third bout of malaria that he couldn’t walk.

“When your child is sick, you go where they are,” she said. Now, Luke was healthy enough to scamper around, charming the other families. “He runs a little too much,” Boyer said happily.

The freeze on exit letters comes at a time when international adoption is getting harder after being relatively fast and easy in the 1990s. Some countries forbade it altogether after unscrupulous agents stole babies or tricked parents into giving them up in order to cash in on a booming business.

Russia issued a ban on U.S. adoptions nearly three years ago in a move widely considered to be political.

Massie said she hasn’t heard a good explanation as to why the Congolese government stopped issuing the exit letters. “We were told at the time that they were stopping . . . for up to one year because they weren’t sure if the children were being treated well when they came home or because of corruption in their own courts. We haven’t really known.”

Congo authorized the exit visas for finalized adoptions after a years-long wait. Three of the adopted children landed at Dulles Airport on Nov. 11 and were greeted by the waiting arms of their U.S. families. (WUSA9)

Calls to Congo’s embassy in Washington were not answered, and no one was there Wednesday afternoon.

Since the freeze, the State Department has strongly cautioned U.S. citizens against adopting children in Congo. For the hundreds of families still in limbo, a State Department official said Wednesday, “U.S. government officials, including Secretary [John F.] Kerry, have engaged with Congolese authorities at the highest levels, including President Joseph Kabila, about lifting the exit ban. We will continue to raise our concerns.”

The Congolese government apparently plans to enact a new adoption law, the official said, but no details were provided.

Linda Scotto is awaiting that day. She drove to Dulles from Doylestown, Pa., although her 8-year-old adopted daughter, Miriam, remains just a photo she holds up on her cellphone’s screen.

“It’s like looking at a sonogram,” Scotto said. “Once you’ve seen your child, she’s your daughter.”

Kari Fields joined her at the airport after an eight-hour drive from North Carolina. Fields said that when she first thought of adopting a child from Africa, she had no idea what the process would be like — she was just 10 years old, on a family trip to Kenya.

Fields is now 41. She has been through eight miscarriages, numerous failed attempts to adopt, five heartbreaking times when she came so close to having another child one way or another that she even prepared the child’s clothing in the closet.

She has one child at home — her biological son Luke, 6 — and has arranged to adopt three from Congo.

“I really need my kids to come home, for me and for them,” she said. Then she pointed to Luke, playing between the seats in the airport’s waiting area. “For him, it’s hardest. Letting your kid grow up without a sibling, when that’s all you’ve ever wanted for him — I feel like I’ve failed him so many times.”

A State Department alert last month warned U.S. adoptive families of Congolese children that “attempting to circumvent the exit permit suspension could have severe implications,” including “placing adopted children and individuals helping children leave in serious harm’s way, jeopardizing the validity of the adoption, the possible arrest of parents in the birth country, and potential restriction of parents’ ability to visit their adopted children.”

The official did not say whether any U.S. families had attempted to spirit children out of Congo, but a Reuters investigation claimed that more than 80 children have been smuggled out to the United States.

Massie visited Congo last year to help move her children into a foster home. “It was hard,” she said. “I didn’t want to be one more person in their life to leave. I wanted the first time I visited them to be the time I brought them home.”

The visit cemented their bonds. They communicated in French, a second language for all. “French and lots of charades,” she said. Massie and her husband now exchange e-mail with the foster family, but the last time they saw the children was during a Skype chat in February.

“These are children who’ve heard ‘Goodbye’ too many times, and I looked them in the eye and said, ‘I will come back for you. Mama and Papa love you and will come back for you.’ ”