"When we jumped into WWII, we didn't have enough equipment."
True, but in short order the country, including it's war industry, was mobilized.
But today, we would need congressional investigations into environmental concerns, union concerns, wage concerns, gender concerns, multicultural concerns, ethnic concerns, muslim concerns, health concerns, age concerns, political concerns, racial concerns, immigration concerns, homosexual concerns, etc. THEN we will mobilize. It may take 5 or 6 years, but we'll be ready to go!