Defense stocks are on the move after earnings. Lockheed Martin (LMT) moved to the downside after posting a big profit miss, not helped by a one-time $1.6 billion pre-tax loss. Jenny Horne takes a closer look at the sharp sell-off and how peers like Northrop Grumman (NOC) are rallying Tuesday morning. She also talks about General Motors' (GM) tariff tactics, which includes absorbing $1.1 billion in costs.