Boeing Planes: Sudden Death

Try to name the 10 most populous urban areas in each of these historical years.

Evil aliens have decided to kill everyone on Earth! Fortunately, they've given you two minutes to save as many as you can. All you have to do is name a country to save everyone in it.

Click the countries whose flags are have EXACTLY two colors.

Drag the flag onto the correct country. Careful, though! One wrong move and the game ends.