Couldn't find an English source so… German: http://www.heise.de/newsticker/meldung/RSA-Boss-Ja-wir-haben-mit-der-NSA-zusammengearbeitet-2125195.html
On the RSA Conference 2014 the RSA boss said that they indeed worked with the NSA and they did weaken the Dual_EC_DRBG algorithm because the NSA were their biggest client and they asked for it. They essentially say that this is completely fine because they just do what they get told to do by their client.
They also said that they have to work with the NSA because of the Information Assurance Directorate and that every other US company has to do the same. Them some more pretty talk about how this all is about the defense of the country.
Nothing new, just confirmations and another reason why you simply can NOT trust ANY US based company.
And then there was Microsoft. They still denial that they have any backdoor in their code and talks about the registry key NSAkey and asks the rhetorical question "Do you really think that we hide a secret backdoor in our code and then call the thing NSAkey?". The sentence of full of shit (e.g. he specifically said a "secret" backdoor which doesn't include obvious backdoors) and asking this as a rhetorical question implies the answer "No!" but it's certainly not that clear and there is no obvious answer to it.
Also nothing new, just Microsoft being Microsoft. There is no reason to trust them at all (friendly reminder, they were one of the first companies in the PRISM program; no source code; no reproducible builds; automatic updates; Trusted Computing; ...).