AviraDeArah, you can say whatever you want about R’ Yaakov Kaminetsky zt”l, but it’s not true.
A student at the time wrote an article about what R’ Yaakov really said. It was also said by R’ Reisman in one of his shiurim.
In Torah v’Daas they brought a television into the yeshiva to see the news of the war. When they announced that the Har haBayis had been captured, R’ Yaakov ran into the beis medrash and made a shehecheyanu. He then began reciting Hallel, with tears streaming down his cheeks.