Which eras ended with a mass extinction?

Read case #5 - "targeting target" (on pages 77-78 of your textbook), then answer the following questions: do you think it was ethical for authorities to use one of the high-ranking members to trap other gang members? why or why not? how would you approach the target situation? use the internet to research and find the best practices to protect from identity theft.

The economy of the united states is best described as

What would you call a political system that is only meant to last for a short time