Iran has executed Roozbeh Vadi, a nuclear scientist accused of spying for Israel and aiding in the assassination of another scientist during the recent conflict between the two nations. Authorities claim Vadi had access to highly sensitive information and was found guilty of providing classified data to Israel. The execution comes after a brief but intense war in June, during which Israel reportedly killed dozens of Iranian commanders and scientists, allegedly aided by deep infiltration of Iran's security apparatus. In the aftermath, Iranian officials have launched a sweeping crackdown, arresting hundreds suspected of espionage or threatening national security.