Tehran has reacted to the external threats from Israel and the US by launching a new internal security crackdown. Iranian authorities have reportedly arrested more than 700 people over alleged links to Israel. It came after the Israeli spy agency Mossad released footage of what it said were Israeli agents operating in Iran. Activists say as many as six people have since been executed. And high-profile opposition figures have been arrested without charge, like rapper Toomaj Salehi and human