CNN reviewed hundreds of videos, analyzed state drone-detection data and traveled to the US-Mexico border to investigate how cartels and other criminal groups are using drones in their operations.

Trump says Iran war will end after midterms

Trump to restore Confederate memorial & drop slavery context

Congressman on Trump's 100+ posting spree: 'It's unhinged'

Ted Cruz says US in 'military conflict' with Iran, not at war

CNN Poll: Two key senate races are neck and neck

Saudi oil attacked, US strikes Iran’s tankers & more | Experts on Iran

Houthis attack Saudi Arabia as US weighs Mideast pullback

Iran attacks Jordan, Bahrain & Kuwait, defying Trump's warnings