Which two countries have the longest land border?
United States and Canada
United States and Canada
United States and Canada
United States and Canada
Canada and Mexico
United States and Canada
Canada and the United States
United States and Mexico
Mexico and Canada
United States & Canada
Australia and New Zealand
Canada and United States
United States and Mexico
United States and Canada
The United States and Canada
United States & Canada
United States and Mexico
United States & Canada
Canada and Mexico
The United States and Canada
United States and Canada
Russia and China
United States & Canada
Canada and United States
Mexico and Canada
United States and Mexico
Mexico and Brazil
Canada & United States
United States & Mexico
Canada & Mexico
United States and Canada
China and Mexico
United States & Canada
The United States and Mexico
United States and China
United States and Canada.
The United States and Canada
Canada and Mexico
United States & Mexico
United Kingdom and Canada
United States and Mexico
United States and Japan
United States and Russia
Canada and the United Kingdom
United States & Canada
United States and Canada
United States and China
Canada & Mexico
The United States and Mexico
United States & Mexico
Mexico and Canada
Russia and China
United States and Japan
United States and Canada.
United States and Mexico
United Kingdom and Canada
United States & Canada
The United States and Canada
United States and China
Australia and New Zealand.
United States & Mexico
Canada and Mexico
United States and Canada
United States and Japan
United States and Russia
United States and Mexico.
The United States and China
United States and Canada.
United States and Mexico
The United States and Mexico
United States & Mexico
Canada & Mexico
United States & Canada
Uzbekistan
United States and China
Mexico and Canada
The United States and Japan
United States and Canada,
United Kingdom and Canada
Canada & United Kingdom
United States and Japan
United States and Canada
The United States and China
The United States and Russia
United States and Russia
United States
Canada and Mexico
United States and Mexico
United States & Canada
Uzbekistan
The United States and Canada
United States & Mexico
United States and Canada.
The United States and Japan
United States and China
The United States and Mexico
The United States and Russia
The United States and India
United States
United States of America
United States and Japan
United States and Canada
United States and Russia
United Kingdom and Canada
Mexico and Canada
The United States and China
Uzbekistan
United States and Mexico
United States & Russia
United States & Mexico
United States & Canada
U.S.
United States
The United Kingdom and Canada
United States and China
The United States and Japan
Canada and Mexico
United States and Japan
US-Mexico
The United States and Russia
United States & Japan
United States and Russia
The United States and Canada
United States and Canada
United States
U.S.
United States and Mexico
United States & Mexico
United States & Canada
Canada, United States
Canada & Mexico
The United States and India
United States of America
United States and China
Mexico and Canada
US-Mexico
United States
United States and Canada.
United States and Canada
United States & Mexico
Canada and Mexico
U.S.
United States and Mexico
United States of America
US-Japan
United States
United States and China
United States and Japan
United States and Russia
United States of America
Mexico and Canada
United States
United States and India
U.S.
United States and Canada
The United States of America
United States & Canada
Canada and Mexico
Canada, United States
United States - Canada
United States and China
United States and Japan
United States and Russia
United States
United States of America
United States & Mexico
United States and Mexico
United States & Russia
United States & Canada
United States & Japan
Mexico and Canada
Canada, United States
China
United States
Canada and Mexico
United Arab Emirates and Turkey
US/Canada
United States - Mexico
United States & China
China
United States and Mexico
United States and Canada
United States
United States - Canada
United States and China
China
United States of America
United States and Japan
US/Canada
United States, Canada
Mexico and Canada
United States/Canada
United Arab Emirates and China
United States & Mexico
United States
United States / Canada
Canada and Mexico
China
United States and Canada
United States & Canada
United Arab Emirates and India