Need help VisitfromCanada2005-06-30 17:43:07

I want to invite my brother and his family (they are in Canada) come to U.S for a short time visit (two weeks). Could someone please tell me what forms do I need to fill out? And what should write in the invitation letter?

Thanks a lot.

如果他们常住加拿大，有没有你邀请没啥区别，就申请旅游好了