USA Today
147

20 years after 9/11, here are the biggest threats to the US today

It's been 20 years since 9/11. Here's what our domestic security correspondent says are the biggest threats to U.S. national security today.

USA TODAY Top Headlines

Entertain This

Special Delivery

Politics

Afghanistan: Past and Present

Problem Solved

Coronavirus Coverage

Sports Headlines

Humankind

Militarykind

Just the FAQs

Animalkind