"World War II and the Cold War": HTML5 Crossword

Across

4. Mass killing of Jews and other deemed "undesirables" by Hitler and the Nazis? (9)
5. Standoff between the Soviet Union and the US, when the Soviets placed missiles in Cuba? (18)
6. Foreign policy theory that if one nation falls to communism in a region then they all will? (12)
9. Treaties signed in the 1970s, aimed at limiting arms creation in the US and the Soviet Union? (14)
11. Military alliance of western democracies created in 1945? (4)
13. Created in 1961 by the Soviets to keep east Berliners from escaping? (10)
14. Giving into the demands of the aggressor just to keep the peace? (11)
15. Thawing of tensions between the US and USSR in the 1970s? (7)

Down

1. Foreign policy aimed at containing the spread of communism? (14)
2. The most controversial and effective means for Truman to end the war? (11)
3. Satellite launched by Russians that created great national pride and also inspired the US to funnel money into defense education? (7)
7. The act of putting all of a nation's resources into the war effort? (8)
8. Military alliance of communist bloc countries created by 1955? (10)
10. Economic aid extended to wartorn countries after WWII? (12)
12. Japanese Americans rounded up and put in labor camps during WWII? (10)