Hi Ron, First let me tell you a little history about this. My mom had already have non-immigration visa and she was in US before. now her visa is expired. My sister was denied few times . My mother is 70 and my sister would be a big help if she can join her but I am afraid my sister would be denied again! My question to you is: What is best approach when applying, should they apply individually or as a pair? They both want to come visit me and my family ( I am a US citizen). Thank you in advance!