"Today, the US spends less on defense as a percentage of our economy than we did at any time since he Japanese attack on Pearl Harbor. For the world's only superpower, that is an invitation to very serious trouble"

This quote by Steve Forbes is a cautioning about the present state of United States defense spending. He mentions that the US is investing less on defense as a portion of its economy than it has because the Japanese attack on Pearl Harbor. This is a concerning pattern, as the United States is the world's only superpower. Forbes is alerting that this lack of defense spending might cause severe difficulty for the United States, as it is leaving itself susceptible to attack. He is advising the United States to increase its defense spending in order to protect itself and preserve its status as the world's only superpower.