B Visa

I recently abandoned the US for Canada. I had been living in the US illegally for 15 years (since the age of 11). I got an opportunity to conduct biological research at the University of Alberta, AB, and Canada. I'm fully funded to live in Canada by the institution. Anyway, I would like to return to the US in 2013 for my 10 year high school reunion. I would like to know how likely I would be to get a tourist visa given my recent history. I have no intentions of staying in the US, just visiting. Am I automatically banned?

I am having a problem getting my visitor visa. My fiancé is a US citizen and my sister is on H-1B visa she is there since 3 years with her family... my parents got their (B1-B2) visitor visa. But when ever I apply for B1-B2 I get rejected. My question is, when they ask me why you want to go to the USA my answer was to visit my sister and her family. Now can I answer like this? My fiancé is a US citizen and I want to meet her and get married.

Will I get 15 days visa for US as tourist visa and in this time marry a friend who is U.S citizen and also born over there in USA, so could I be able to apply for visa extension and then apply for PR in USA?

I am a US citizen - my partner is a citizen of the UK (we are not married). He is a consultant in the international development field so travels frequently, but often visits me in the US when he is not working. He has been to the US for visits of 2-3 weeks duration about 6 times in the last year. The past few times, immigration has hassled him about the number of visits he is making. We are concerned that one of these times he may be refused entry - is this likely?

I am a UK resident and currently have a B1 visa with 7 years to run. When I enter the US via LAX they always stamp my passport and issue the I-94 card for 12 months. We always leave before the date given. Question - do we have to go back to the UK (our country of origin) or could we go to Canada for a week and then re-enter the US?

I am working in a Federal Gov't Agency, and in the near future leaving for Frankfurt, Germany, for a conference, and with a plan in mind to fly to USA via Germany after my conference is completed. My question, here, is that whether I can use my US visa, which is valid up to Apr 06/2012, whereas the passport has already expired by last May 23/2011, and due to be replaced by a new one.

I have a brother here in US who is diagnosed with cancer. I would like my mom and brother who live in India to come and visit him. What type of visa should they apply for in India and how long will it take? On which visa can they come as soon as possible.

My mother wants to travel to US on her existing visit visa. We recently filed for her GC petition as well. We are wondering if she is allowed to travel on that same visit visa. Her visit visa is also expiring soon, would that be a problem coming into USA?