This nest building behavior is instinctual for male bettas and it is not necessary to have a female present to observe your betta building his nest. Most males will blow bubbles but the rate and size of the nest seems to depend on the individual male and possibly, other factors like age, health and water parameters.
Berlin was always the centerpiece of the Cold War and, more often than many remember, very nearly the front line of real combat. At the end of World War II, the city was divided into four sectors, each occupied by one of the four allied armiesâU.S., Soviet, British, and French.
The Berlin Airlift could be called the first battle of the Cold War. It was when western countries delivered much needed food and supplies to the city of Berlin through the air because all other routes were blocked by the Soviet Union.After World War II. After the airlift Germany was split into two separate countries, the German Democratic Republic in the east (controlled by the Soviet Union) and the Federal Republic of Germany in the west. 2  The city of Berlin was also divided in half, with East Germany eventually building the Berlin Wall to keep people from defecting.