Thanks 

 But I'd rather stay here for a while, there is a serious chance that I'll be arrested when I'll step on American soil 

Wolfala, thank you, but I am no more then a drunk irresponsible Soviet engineer (this remark is for Genozaur 

)...
BTW, I studied at "Physcs and technology of explosive and impact processes" department in 
MSTU, and worked with explosives and other funny things until 1994. What should I write in a new American visa form? They probably track all the students from my department, and I always prefer not to lie, is there a theoretical chance to  get a visa for a person who will honestly mention his experience with explosives?
I am asking only because it's interesting, I don't plan to apply for American visa in foreseeable future.