Richard Prebble: Middle East crisis exposes Christopher Luxon’s weakness on global shocks NZ HeraldChristopher Luxon faces crunch week as Iran crisis continues ThePost.co.nzFirst hurdle cleared but upcoming risks for Luxon StuffBarry Soper on Luxon, the Middle East and petrol Newstalk ZBHow a blue-chip corporate-world leader fell below investment grade ThePost.co.nz