America's war in Afghanistan is the longest war the U.S. has ever fought. Beginning a month after the terrorist attacks of Sept. 11, 2001, the initial mission was to remove the Taliban from power and destroy the al-Qaida terror network. Now, nearly 17 years later, Pulitzer Prize-winning journalist Steve Coll points out that the war's goals have changed.

"The objective is not a grand peace ceremony on some grand aircraft carrier," Coll says. "It's to reduce the violence in Afghanistan, to reduce the suffering of innocents in Kabul, to support the constitutional government that we invested in after Sept. 11 so heavily in money and in American lives and sacrifices on the battlefield."

Coll's new book, Directorate S: The C.I.A. and America's Secret Wars in Afghanistan and Pakistan, is a follow-up to his Pulitzer Prize-winning Ghost Wars, which documented U.S. involvement in the region starting with the 1979 Soviet invasion of Afghanistan until Sept. 10, 2001.

The new book — whose title is taken from the name of the Pakistani spy wing providing covert support to the Taliban — chronicles U.S. efforts in Afghanistan and Pakistan since Sept. 11, 2001. Coll warns that an end to the war is not in sight.

"Most of the generals ... say in public, 'There's no military solution to this war,'" Coll says. "This is at best a grinding stalemate. And yet, we prioritize military action at the expense of diplomacy, at the expense of negotiating."

Interview Highlights

On the current state of the war in Afghanistan

We're in a stalemate. We're in a muddle. We have something like 10,000 troops there, maybe growing a little higher over the next year or so.

There are actually two wars that we're fighting in Afghanistan, I'm not sure most Americans appreciate that. One is a direct combat war against remnants or elements of the Islamic State that have popped up in eastern Afghanistan. There President Obama initiated, and President Trump continued, a return to direct combat in Afghanistan, after previously, at the end of 2014, saying we were done with the war.

The second war is the one that we transitioned to in 2014, which is to advise and assist the Afghan security forces — the Afghan army and police — in their combat against the Taliban, an indigenous Afghan movement that we're all too familiar with after all these years, which controls significant swaths of the Afghan countryside.

So our muddled war policy is that we're directly at war with the Islamic State, but we're not directly at war with the Taliban, except to the extent that we're supporting Afghan forces. But what that means as a practical matter is that we're their air force; we have the planes. So when the Afghan forces need bombs dropped on Taliban positions, that's generally us doing the bombing. The number of bombs that we've been dropping on Afghanistan has increased significantly in 2017 over the year before.

On why Pakistan supports the Taliban

Pakistan's generals seemed to conclude ... that Afghanistan was going to become an ally of India with international backing [and] that they needed to encourage the Taliban support. ...

So this starts around 2004, 2005, it really gets serious. ... Around that time, the Bush administration cut a really big agreement with India about its nuclear program. We basically forgave India for having a nuclear weapons program and offered significant nuclear assistance. We told Pakistan at the same time, "You're not going to get that deal. You're too much of a rogue state. You sell weapons abroad without permission. Anyway, we don't trust you enough."

And it was around that time that the high command in Pakistan really thought, "You know what? The Americans are not reliable. They're really going all-in with India, our archenemy. The Americans are saying they're going to leave Afghanistan. They're really concentrating on their war in Iraq. Let's get back to work finding a way to have influence in Afghanistan through the Taliban."

And that's when the war really started to deteriorate, and we did not see it coming.

On what's going on now with the Taliban in Pakistan

What's happened, where we are now, is that there are 25,000, 30,000 Afghan Taliban guerrilla soldiers fighting the war, going in and out of Pakistan, but fighting the war on Afghan ground. Those units include these suicide bomber, truck bomber units that occasionally kill scores of innocent civilians in Kabul, as we've seen over the last couple of weeks, a couple of horrific attacks.

And then inside Pakistan, the effort by the Pakistani Taliban to overthrow their government has really faltered. The Pakistani state has restored security over the last couple of years to a significant degree. Not entirely — I think 500 civilians died in terrorist attacks in Pakistan last year — but [that's] compared to many thousands a few years ago, when the country looked like it might collapse.

So what you have now is a picture of Pakistani stability, relatively, and Afghan instability getting worse, and one of the ways that's happening is that al-Qaida, little elements of al-Qaida or international terrorist groups, the Islamic State, have migrated back to Afghanistan from Pakistan. So one of the effects of the Pakistani approach to the war has been they've more or less finally managed to kick out a lot of the people who came into their country after 2001 that they didn't want, because they're revolutionaries.

This is why the United States is back at war in Afghanistan. It's why President Obama was not able to end the war as he had hoped to do at the end of 2014. It's because along the eastern frontier of Afghanistan, near the Pakistan border, there are groups either affiliated with the international ambitions of the Islamic State, or other international terrorist groups including al-Qaida.

Sam Briger and Mooj Zadie produced and edited this interview for broadcast. Bridget Bentz and Molly Seavy-Nesper adapted it for the Web.

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