The USS Liberty was a US Navy technical research ship accidentally struck by the IAF on the fourth day of the Six Day War, after being misidentified as an Egyptian warship.
Brzezinski, who was former president Jimmy Carter's national security adviser, endorsed Barack Obama's presidential campaign. However, he has no role in the current administration.
Meanwhile, in an interview with CNN aired on Sunday, Russian President Dmitry Medvedev said that President Shimon Peres had assured him that Israel was not planning a military strike on Iran.
"When he visited me in Sochi, Israeli President Peres said something important for us all: 'Israel does not plan to launch any strikes on Iran, we are a peaceful country and we will not do this'," Medvedev said.
On Thursday, Defense Minister Ehud Barak was quoted as saying that Iran does not constitute an existential threat against Israel.
"I am not among those who believe Iran is an existential issue for Israel," he told Yedioth Aharonot. "Israel is strong, I don't see anyone who could pose an existential threat."