Iran leadership tainted by 1988 executions; U.N. must investigate Add caption Iran's president Hassan Rouhani waves to reporters next to a portrait of supreme leader Ayatollah Ali Khomenei is he leaves at the end of a press conference in Tehran on August 29, 2015. File Photo by Ali Mohammadi/UPI | License Photo BRUSSELS, Sept. 2 (UPI) -- The summary execution of more than 30,000 political prisoners by the Iranian regime in the summer of 1988 surely must rank as one of the most horrific crimes against humanity of the late 20th century. The vast majority of the victims were activists of the opposition People's Mojahedin of Iran. The mass executions, in jails across Iran, were carried out on the basis of a fatwa by the regime's then-supreme leader, the murderous Ayatollah Ruhollah Khomeini . A "death committee" approved all the death sentences. Mostafa Pour-Mohammadi, a member of that committee, is today President Hassan Rouhani 's...