Reply To: who is "The Gadol Haddar" of America

He learned in Kfar Chassidim by Reb Elya Lopian And then went to Ponovitch where he got very close with Reb Shach and Rav shmuel Rozovtzky who gave him semicha. here is a video of reb chaim praising him very highly

http://www.theyeshivaworld.com/news/headlines-breaking-stories/319690/video-and-photos-hagon-harav-chaim-kanievsky-establishes-yeshivas-vilna.html

this is a YWN article on reb chaim naming rabbi aderet head of his yeshiva and the video is there