In what year was the West Nile virus first identified as an emerging threat in the United States?

Which of the following statements regarding fire barriers is LEAST accurate?

A. They can be used in stairwells. B. They can only be 3-hour rated structures. C. They can be constructed from a wide variety of materials. D. Their construction is nearly identical to that of fire partitions.

A method used to calculate the amount of force involved in a collision would be:

A) acceleration × deceleration. B) mass × acceleration (or deceleration). C) speed × velocity. D) none of the above.