My parents are in USA on B1/B2 visa with a valid I-94 till May'2015 and planning to apply for extension of stay, I have below questions... If we apply for extension of stay (I-539) in March'2015 and they leave USA as per plan (May'2015-per I-94) before approval, does it affect their future trips in port of entry as they have 10 year multiple entry B1/B2 visa? If we apply for extension of stay (I-539) in March'2015 and they got rejected extension of stay (after May'2015) and leave USA immediately after rejection, will they need to go to visa again before their next trip to USA though they have 10 year multiple entry B1/B2 visa which is valid till Sep'2024? Thanks inadvance!!