Confusion on stance of Litvishe gedolim to attend the Atzeres in Manhattan

The sons of Rav Chaim kanievsky have issued a letter below stating their father has recanted and agrees with Harav Shteinman that Bnei Torah should not attend the rally in Federal Plaza it is signed by his two sons Rav Shlomo and Rav Yitzchok Shaul. Rav Elya ber Wachtfogel issued a letter HERE in the name of Rav Chaim supporting the opinion of the Brisker Roshei yeshiva that bnei Torah should attend the Satmar demonstration against Giyus Bnei hayeshivos by the Israeli Govt, on Sunday June 9th 2013. On Erev shabbos HaRav Shmuel Kamenetzky the Philadelphia R"Y issued a letter to his Talmidim Not to go to the protest. HaRav Aaron Schechter RY Chaim Berlin issued a letter urging his talmidim to attened and will speak at the Rally. Yeshiva Torah Temima will also attend the protest.
The Atzeres machaah or Demonstration/ralley will take place  in New York City Sunday June 9th At Federal plaza/Foley Square in Lower Manhattan.
For driving directions- Lafayette Street corner Worth st. at federal plaza
Time:  At 4:00 pm