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The dust has begun to settle.

The draft is over. Free agency has spoken. Power to the coaching carousel has been shut down.

At the end of it all, we have an altered landscape in the NFL, as is the case every year. How has this affected defenses?

Based on all the movement—and, in many cases, the stability—let's take a look at where each NFL defense stands as we march on toward the preseason.

Will Darrelle Revis propel the New York Jets to the top? Can the San Francisco 49ers weather the retirement storm? Who has improved the most?

Click through to find out.