What is the biggest threat America faces in the 21st century?

12 point font -Double Spaced -Times New Roman -What is the biggest threat America faces in the 21st century? Is this threat military in nature (something we can combat with our armed forces)? Or is this a non-military threat? (You can discuss a current threat that the United States is facing). Why have you identified this particular issue as this biggest challenge for the United States in the 21st century? Be sure to discuss how the United States is responding to this threat (if at all) and give potential solutions.