HaRav Chaim Kanievsky once accompanied the Chazon Ish to visit Reb Amram [Blau] in prison. The Chazon Ish told Reb Amram “we are all sitting in one big prison.” Reb Amram said it had all been worth it to merit that one visit from the Chazon Ish.
From Yeshiva World News, here.
I hear the story also appears in Maaseh Ish volume 5, which was somewhat vetted by Rabbi Chaim Kanievsky.