This is CNBC's Morning Squawk newsletter. Subscribe here to receive future editions in your inbox. Happy Thursday. If you're attending CNBC Pro Live tonight at the Nasdaq MarketSite, look out for me at the cocktail hour. Stock futures are lower this morning after all three major averages eked out gains yesterday . Here are five key things investors need to know to start the trading day: Crude oil prices are higher this morning after Iran said it targeted an American air base following new U.S.