Israel has attacked a key petrochemical plant at Iran’s massive South Pars natural gas field and killed a top Revolutionary Guard commander, putting into question the negotiations aimed at getting the U.S. and Tehran to reach a ceasefire. DUBAI, United Arab Emirates (AP) — Israel attacked a key petrochemical plant at Iran’s massive South Pars natural gas field and killed a top Revolutionary Guard commander, putting into question the negotiations aimed at getting the U.S. and Tehran to... [7303 chars]