It seems they are all images - not OCR'd, and the task requested is to manually read and type summaries. That's useful but it seems like a good place to start would be to OCR it and provide a searchable copy.
The call-to-action [0] in the submitted article is meant more for serendipitous crowdsourcing, so the image/scan is presumably enough for that usecase. The actual dump (i.e. "tranche") of memos is hosted on DocumentCloud, which has the underlying OCR data per page, and is searchable:
Page 510 appears to be discussing who needs overthrowing. It's a letter to Rumsfeld from the American Foreign Policy council.
> Under a Smith-Richardson grant, AFPC Senior Fellow, Elie
Krakowski hs been exploring ways to replace the Taliban
government. During the past year, he has held discussions with
relevant officials in Pakistan, India, Russia, Turkmenistan,
Uzbekistan, Tajikistan, China, and an anti-Taliban area of
Afghanistan.
> Someone from your policy shop should debrief him. His phone
is 410-xxxxxxx.
Thanks for trying to help, and yes date picker needs work! Should accept typed dates in this format: 05/31/2018
To pick older dates you can scroll back to the oldest year, pick a random date, and then open it again and it will let you go back further. Very rough but it’s a newly launched tool we’re working quickly to improve.