We know that they publish stuff with backdoors included. We know that they payed RSA to build backdoors into their crypto. Their is a very good reason that SHA

We know that they publish stuff with backdoors included. We know that they payed RSA to build backdoors into their crypto. Their is a very good reason that SHA3 is not designed by the NSA. Yes you can learn from them, both from their published stuff and even more from how they attacked people.