And so this is not an issue that is simply in one country's interests or two countries' interests.

WHITEHOUSE: President Obama and Prime Minister Cameron Hold a Press Conference | The White House

And by taking part in the democratic process that, for more than two centuries, has made this country one of the greatest countries on Earth, you all are helping to preserve that legacy for generations to come.

WHITEHOUSE: The White House

"The only way an international airline can fly from one country to another is if there's a bilateral agreement between the two countries -- and that agreement will invariably express that each airline has to be substantially owned and effectively controlled by nationals of their country, " he said.

CNN: STORY HIGHLIGHTS

China was one of the first countries to recognize Kenya, establishing diplomatic relations with the country only two days after the Republic of Kenya was formed on December 12, 1963.

FORBES: China and Africa

Partly because Kassala is a trans-shipment point between those two countries and Sudan, the state has one of the biggest HIV problems in the country.

ECONOMIST: Fighting AIDS in Sudan

In a recent paper, we found that bilateral trade between European countries depends positively on the probability that two randomly chosen individuals, one from each country, would be able to communicate with each other in English.

ECONOMIST: South Korea's debt