Is US fighting force big enough?

American's armed forces are growing bigger to reduce the strains from seven years of war, but if the US is confronting an era of "persistent conflict," as some experts believe, it will need an even bigger military.

A larger military could more easily conduct military and nation-building operations around the world. But whether the American public has the appetite to pursue and pay for such a foreign-policy agenda, especially after more than five years of an unpopular war in Iraq, is far from clear.

Read More