1. Yes, if you can get a 212(d)(3) waiver for a limited time or limited purposes.
2. Make sure that this is not really an issue of fraud, get a lawyer don't expect immediate results. If you're lucky you might get this resolved in a few months, but it could take years. There is a waiver called 212(d)(3), you can look into that as well.
3. Basically, when you change passport, you just have to go get a new B-1/B-2 stamping done. It won't be a big issue. More...
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