In some of the other answers, people told that border control stamp a date when coming on VWP. Is this date 90 days? or does it depend on the return ticket?
I am going to be attending a 6 week IT bootcamp(Less than 18 hrs classes/week) & travel for a month ( Well within the 90 day period) before leaving US. Is it legal to attend bootcamp classes on VWP?
I have not decided where I will be staying. Can I apply for ESTA without this information as it does ask for a US contact/address?
Appreciate your answers