The Wall Street Journal reports:

Undercover Taliban agents—often clean-shaven, dressed in jeans and sporting sunglasses—spent years infiltrating Afghan government ministries, universities, businesses and aid organizations.

Then, as U.S. forces were completing their withdrawal in August, these operatives stepped out of the shadows in Kabul and other big cities across Afghanistan, surprising their neighbors and colleagues. Pulling their weapons from hiding, they helped the Taliban rapidly seize control from the inside.

The pivotal role played by these clandestine cells is becoming apparent only now, three months after the U.S. pullout. At the time, Afghan cities fell one after another like dominoes with little resistance from the American-backed government’s troops. Kabul collapsed in a matter of hours, with hardly a shot fired.

“We had agents in every organization and department,” boasted Mawlawi Mohammad Salim Saad, a senior Taliban leader who directed suicide-bombing operations and assassinations inside the Afghan capital before its fall. “The units we had already present in Kabul took control of the strategic locations.”

Mr. Saad’s men belong to the so-called Badri force of the Haqqani network, a part of the Taliban that is designated as a terrorist organization by the U.S. because of its links to al Qaeda. Sitting before a bank of closed-circuit TV monitors in the Kabul airport security command center, which he now oversees, he said, “We had people even in the office that I am occupying today.” [Continue reading…]