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:
<span>In 1492 Italian Spanish navigator Christopher Columbus reached the Americas and claimed the new lands for Castile. </span>
The right answer for the question that is being asked and shown above is that: "D. All of them were affected by the Columbian Exchange." Among the choices, there is no <span>affected by the Columbian Exchange</span>
The Rocky mountains provided the greatest obstacle to railroad expansion
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