@Terry Assuming the story about all the KC-130 tankers going to Europe is true, that would suggest a air campaign sustained by a base or carrier moderately far away from Iran. Like Ramstein for example, or perhaps from carriers in the Mediterranean or Red Sea. This suggests the US is not confident that its air defense systems at its Middle Eastern bases and carriers will withstand Iranian missile bombardment. Or course, its also possible that nothing ever happens Anon.