Chinese legal activist Chen Guangcheng and his family have arrived in the US from Beijing after a month-long diplomatic stand-off.
The 40-year-old, who is blind, was allowed to travel to the US following negotiations between the two countries.
He had been under house arrest since late 2010 but escaped last month and sought refuge in the American embassy in Beijing.
Mr Chen praised Beijing's "restraint and calm" as he sought to draw a line under a month-long tussle that tested China-US ties.
Mr Chen asked to say a "few simple words" as he, his wife Yuan Weijing, and their two young children were greeted with cheers on arrival at the New York University apartment block in Manhattan yesterday that now becomes their home.
He expressed gratitude to the American embassy for ushering him to a new, free life in the United States but added: "I am gratified the Chinese government dealt with the situation with restraint and calm."
Speaking through an interpreter, Mr Chen said he believed the Chinese government's promises were "sincere," although friends of the dissident said he was clearly very worried about the fate of relatives left behind.
One of China's best-known activists, Mr Chen, a self-taught lawyer, won plaudits for investigating forced sterilisations and late-term abortions under China's "one-child" family planning policy.
He and his family touched down at Newark-Liberty International Airport, outside New York, on a United Airlines flight from Beijing shortly before 2230 GMT, capping an astonishing odyssey.
Mr Chen made a dramatic escape from his village in April after seven years spent mostly in prison or under house arrest, eventually securing sanctuary at the US embassy in Beijing.
In a gripping account of his escape, Mr Chen told AFP earlier this month that after weeks of preparation to put his guards off the scent, his wife pushed him over a wall built around his small home.
He broke his foot when he landed on the other side, but undeterred; he scrambled in pain to a neighbour's pig sty, where he hid until nightfall.
After a long and painful journey through fields and over walls, he eventually made his way to the home of a friend.
In a video address to China's Premier Wen Jiabao posted online, Mr Chen said he had suffered repeated beatings and expressed serious concerns for his wife and family.
He pitched up at the US embassy in Beijing less than a week before US Secretary of State Hillary Clinton was due to visit China for high-level talks.
Chinese and American diplomats scrambled to find a solution, and reached an initial agreement under which Mr Chen would stay in China under more agreeable conditions.
Mr Chen left the embassy but regretted it almost immediately, telling journalists that he wanted to go to the United States.
China later relented, saying he could apply to go abroad like any other Chinese citizen.
After being holed up for more than two weeks at a Beijing hospital with his fate still uncertain, Mr Chen was suddenly given notice yesterday to pack up his belongings and prepare for departure.
Jiang Tianyong, a lawyer and close friend, said Mr Chen had mixed feelings about leaving China.
"He seemed to be reluctant to leave and didn't consider it the optimal solution, even though he agreed that it was the best he could do to ensure his personal safety," Jiang said.
US politicians welcomed Mr Chen's arrival but many also expressed concern about his family and other dissidents who remain in China fearing repression.
Former House speaker Nancy Pelosi hailed Chen's arrival in the United States as "a milestone in the cause for human rights in China."
As a research fellow at NYU, Mr Chen is expected to work with other law school experts.
