In their competition for power, nations raced to colonize as many places as possible, since colonization meant an increase in raw materials, as well as usually an increase in labor force through exploited natives.
(1)Hitler: The Rise of Evil (2) Good (3) Elser (4)The Pianists (5) City of Life and Death (6) John Rabe (7)The Children of Huang Shi
The Cuban Missile Crisis, (that may not be it) or the fact that at that time America was looking for new land to call its own at the time, and the fact that Cuba was so close could've helped the US in terms of territory.
It is, or course, a probability. Space has many surprises, in fact, an Ateroid nearly hit earth recently. But, in all seriousness, it most likely will be a very long time before that ever happens.