10 Biggest Questions: Could this be the best defense in the Steve Spagnuolo era?

Heading into the Kansas City Chiefs' season, I'm continuing my "10 Biggest Questions" series about the team. So far, we've asked nine questions:

• What is the Chiefs' contingency plan at offensive tackle?
• Will Deneric Prince or Clyde Edwards-Helaire crack the running back rotation?
• How far along are George Karlaftis and Felix Anudike-Uzomah as pass rushers?
• Do the Chiefs need to add another defensive tackle?