Rely on NSA Suite B Cryptography?
It mainly depends on how the algorithm was selected. If it was selected by a public competition like for AES, then it is likely to be secure. If it was forced in by the NSA such as Dual-EC random number generator, then you may have some doubts.

Other questions you may want to ask yourself are:


Is this an "original" algorithm or was the problem that it relies on already known?
Is there a formal proof (often not possible), checked by independent persons or organizations?


In the end you will always have a grey area here. Some things like AES are probably secure, Dual-EC certainly is not. But for the (NIST/SECP) ECC parameters it's a lot harder to say.

Saying that Suite B is safe or not is a blanket statement that oversimplifies what is happening in the field of cryptography.

As it is highly visible, it will be highly scrutinized by the cryptographic community. But as Dual-EC proves nothing is to be fully trusted.