The 3 countries are Canada, Russia, The United States Of America
Canada forms the northern border of the contiguous 48 states of the United States.
The Pacific, Atlantic and Arctic oceans border the United States. The Indian and Southern oceans do not border the United States.
The Rio Grande River flows along the border of Mexico and the United States of America. It flows along the border of Texas.
The United States of America.
No but the United States of America does, on the north border at least.
The United States of America is the only country bordering Mexico's northern border.
Some major "things" are: * The United States of America * The Atlantic Ocean (east) * The Pacific Ocean (west) * The Arctic Ocean (north)
North America, Europe, and Asia border the Arctic Oceans.
The United States of America.
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North America and South America share a land border with the United States.