I applied for my Non-Immigrant O [90-day] visa in Belgium 10 days ago. I received my approval by email today. I have a few questions, and I hope someone can help me. Do I need to book a return ticket, or can I use a one-way ticket to Thailand, since I'll be applying for a one-year extension there? Is it still possible to open a bank account with this 90-day visa and a TM30 without going through a visa office? Thanks in advance for your help.