Eager travelers and their relatives rejoiced, wept and breathed sighs of relief Monday as the United States reopened to vaccinated visitors, ending 20 months of Covid-19 restrictions that separated families, hobbled tourism and strained diplomatic ties.
From Rainbow Bridge at the US-Canada border to Mexico's Tijuana crossing at San Ysidro, California, cars, motor homes and masked pedestrians clogged entry points from before dawn for highly anticipated reunions.
At airports and other US ports of entry, reunited relatives hugged as many met for the first time since the coronavirus swept the globe, leaving more than five million people dead and devastating economies.
In Europe, passengers lined up excitedly at airports to board planes bound for American cities, while those entering the country by land -- some lugging suitcases or pushing bag-filled strollers under the watchful eyes of border patrol agents -- faced hours-long waits.
Smiling passengers from the first European flight to land under the new rules at New York's John F. Kennedy International Airport entered the terminal to cheers and applause.
As soon as she spotted her son at the New York airport, Alison Henry rushed towards him and gave him a long hug, tears welling up in her eyes.
"I just can't believe it, two and half years!" Henry, 63, said after stepping off a flight from London.
The ban, imposed by then-president Donald Trump in early 2020 and upheld by his successor Joe Biden, had become emblematic of the upheavals caused by the pandemic.
Trump initially closed US borders to travelers from China in February, 2020.
A month later, he extended the ban to large swathes of the world, including the European Union, Britain, India and Brazil, and subsequently to overland visitors from Mexico and Canada.
- 'Today is the day' -
At London's Heathrow Airport, two planes from rivals British Airways and Virgin Atlantic heading to New York took off at the same time from parallel runways to mark the occasion.
To cope with surging demand, airlines have increased the number of transatlantic flights and plan to use larger planes.
Louise Erebara was waiting at JFK for the arrival of her only sister and brother-in-law.
The women had not seen each other in 730 days, said Erebara, who admitted she would "cry hysterically" upon seeing her sister.
"It's been terrible not knowing when we were going to see them again due to Covid, not knowing if the borders were ever going to open," she told AFP.
"Today is the day."
Dulles airport outside the US capital was also filled with happy reunited families Monday as well as professionals getting back on the road again.
Paris-based Paul works for a US company but had been working remotely for more than a year.
The border reopening "allows for reconnecting with people in a meeting room, in person... reconnecting with teams we're used to working with via videoconference," he said after landing in Washington.
French grandmother Anne Dousset was "a little nervous" and "very happy" to see her grandkids again after almost two years, especially the youngest.
"I've missed half her life as she's three-and-a-half. I'll make it up to her."
The feeling of having lost time with loved ones was also fresh for Laurence, arriving in Los Angeles from France.
"We were penalized, and I missed a lot of things. I missed the birth of one of my granddaughters," she said.
- 'Butterflies' -
Along the US-Mexico border, many cities faced economic struggles due to anti-Covid-19 trade restrictions.
But there was little criticism of the border closures among those waiting to enter the United States Monday.
"Well, because of the disease, it was necessary," said Herminia Urieta, who traveled three days from Guerrero, in southern Mexico, to visit a sister she has not seen since the beginning of the pandemic.
Reflecting widespread anticipation of the reopening, currency exchange centers in Mexico's Ciudad Juarez were hit by a shortage of dollars.
To the United States' north, Canadian retirees known as "snowbirds" headed across the border in droves, fleeing winter weather for Florida and other balmy climates.
"We have butterflies," said Daniel Francoeur, who along with his wife waited almost seven hours to cross the Thousand Islands Bridge into New York state after leaving their Ottawa area home at 1:30 am.
"It's been two years since we went to Florida and we didn't want to wait another day," they said.
- Some restrictions remain -
Lifting the travel ban will affect more than 30 countries, but US entry will not be unregulated.
Authorities plan to closely monitor travelers' vaccination status and will still require them to present negative Covid-19 tests.
Starting Monday, vaccines will be required for "non-essential" trips -- including family visits or tourism -- although unvaccinated travelers will still be allowed in for "essential" trips.
A second phase, beginning early January, will require all visitors be fully vaccinated to enter by land.
US health authorities have said all vaccines approved by the US Food and Drug Administration and the World Health Organization would be accepted for entry by air.
Despite concerns over increases in Covid-19 cases in some countries, including a recent upswing in Europe that the WHO warned could mean "another half a million Covid-19 deaths" by February, many only expresed relief at America's reopening.
For 63-year-old Mexican grandmother Isabel Gonzalez, her 20-month wait to hug her San Diego-based children ended Monday when she walked from Tijuana into California.
"Thank God we are here," she said.