With Saturday's military operation against Iran, President Donald Trump demonstrated a dramatic evolution in risk tolerance, adjusting in just a matter of months how far he was willing to go in using American military might to confront Tehran's clerical rule. Guardrails were tossed aside, as Trump and Israeli Prime Minister Benjamin Netanyahu ordered up a battle plan that included targeted strikes on Iran's leadership, including the 86-year-old Supreme Leader Ayatollah Ali Khamenei whose death Trump triumphantly announced in a social media post hours after launching the military operation. For Trump, it was a far cry from where he stood just eight months ago. At Israel's urging during its 12-day war with Iran last June, he agreed to deployB-2 bombers to pummel three key Iranian nuclear sites - but drew a bright red line when Israelis presented his administration with a plan for killing Khamenei. The president peppered the supreme leader with thinly veiled threats back in June that h