L2 Visa help
 

Hi there, I've got an L1-B visa and i'm currently in the US but my wife and kids are back in the UK and I want to get them an L2 visa so they can come over and live with me can anyone tell me what paperwork my wife will need to take to the visa iterview apart from the Ds-156 form and her interview confirmation letter, she has a copy of my i-797B is there anything else she needs to get hold of before she goes, Also can she take my childrens paperwork with her and only pay for 1 interview fee

Many Thanks Billy