The Afghanistan war has lasted for 18 years. Here’s 1 image from every year of America’s longest war.

The Afghanistan war has lasted for 18 years. Here’s 1 image from every year of America’s longest war.

The United States entered into war in Afghanistan less than a month after the deadly attacks on the Pentagon and the World Trade Center in 2001. Eighteen years later, more than 775,000 US troops have …