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active shooter events are often over in 10 to 15 minutes In police training manuals, the police response to an active shooter scenario is different from hostage rescue and barricaded suspect situations.[3][4] Police officers responding to an armed barricaded suspect often deploy with the intention of containing the suspect within a perimeter, gaining information about the situation,
Explanation:
A. radio
The radio became popular in the 1920’s due to Americans finding a new interest in music.
Many countries wanted to control over many economic activities in other countries as well as utilize other countries for cheap labor. In addition, some countries wanted to explore the world and conquer for their homeland while other countries thought that their own country and race was superior to all other countries and therefore believed it was needed that they invade other countries and educate them as well as some countries practicing imperialism to convert people to their religion.
Answer:
The Great Plains.
Explanation:
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