The United States reopened its borders to vaccinated international travelers on Monday, welcoming many visitors who have been shut out of the country for nearly 20 months.

We've seen emotional scenes across the country as people are reunited with loved ones.

There are also long lines as travelers navigate the new rules that are in place.

Cars line up to cross into the United States from Tijuana, Mexico, on November 8.
Cars line up to cross into the United States from Tijuana, Mexico, on November 8.
Guillermo Arias/AFP/Getty Images
Traysi Spring holds a homemade sign as she and her husband, Tom Bakken, welcome international travelers in Blaine, Washington, on November 8.
Traysi Spring holds a homemade sign as she and her husband, Tom Bakken, welcome international travelers in Blaine, Washington, on November 8.
Elaine Thompson/AP
Abdul Shukoor embraces his nephews as they are reunited at an international airport in Chantilly, Virginia, on November 8. Shukoor had just flown in from Brussels, Belgium.
Abdul Shukoor embraces his nephews as they are reunited at an international airport in Chantilly, Virginia, on November 8. Shukoor had just flown in from Brussels, Belgium.
Kevin Lamarque/Reuters
Workers Brian Martin, left, and Zach Haesche stand under the Peace Arch at the port of entry in Blaine, Washington, on November 8. They were putting up new American and Canadian flags.
Workers Brian Martin, left, and Zach Haesche stand under the Peace Arch at the port of entry in Blaine, Washington, on November 8. They were putting up new American and Canadian flags.
Elaine Thompson/AP
Heather and Ricky Sims of Salmon Arm, British Columbia, sit in their RV as they wait to cross into Blaine, Washington, with their dog Rocky on November 8. They were heading to Yuma, Arizona.
Heather and Ricky Sims of Salmon Arm, British Columbia, sit in their RV as they wait to cross into Blaine, Washington, with their dog Rocky on November 8. They were heading to Yuma, Arizona.
Jason Redmond/Reuters
People wait in line to clear customs at a port of entry in El Paso, Texas, on November 8.
People wait in line to clear customs at a port of entry in El Paso, Texas, on November 8.
Paul Ratje/AFP/Getty Images
Lufthansa crew members pose with US flags in Munich, Germany, before a flight to Miami on November 8.
Lufthansa crew members pose with US flags in Munich, Germany, before a flight to Miami on November 8.
Christof Stache/AFP/Getty Images
Jill and Stephen Brownbill react as they meet their young grandson, Rocco, at an international airport in New York on November 8.
Jill and Stephen Brownbill react as they meet their young grandson, Rocco, at an international airport in New York on November 8.
Carlos Barria/Reuters
A couple embraces in New York after a flight arrived from the United Kingdom on November 8.
A couple embraces in New York after a flight arrived from the United Kingdom on November 8.
Ed Jones/AFP/Getty Images
Cars from Canada line up to enter the United States at a border crossing in Blaine, Washington, on November 8.
Cars from Canada line up to enter the United States at a border crossing in Blaine, Washington, on November 8.
Elaine Thompson/AP
Paul Campbell waits for his fiancee, Patricia Bittag, at Boston's Logan International Airport on November 8. She was arriving on a flight from Amsterdam, Netherlands. They had been separated for 23 months.
Paul Campbell waits for his fiancee, Patricia Bittag, at Boston's Logan International Airport on November 8. She was arriving on a flight from Amsterdam, Netherlands. They had been separated for 23 months.
Brian Snyder/Reuters
People enter the United States at a port of entry in El Paso, Texas, on November 8.
People enter the United States at a port of entry in El Paso, Texas, on November 8.
Paul Ratje/AFP/Getty Images
A couple kisses each other as they are reunited in Chantilly, Virginia, on November 8.
A couple kisses each other as they are reunited in Chantilly, Virginia, on November 8.
Olivier Douliery/AFP/Getty Images