USA Unemployment at its lowest since 2009's 10% 

At 5.4%

Unemployment has been feeling the past few years since the property and the financial crash of 2007-08 which is the worst recession since the 1920's depression.

What are the main causes of the fall in unemployment?

Is it because of a recovering American economy? 

Good global trade? 

Good government policy?

If you want to look more deeply into this topic, here are two interesting articles.

Business Insider: US unemployment rate falls to 5.6% (09/01/15)

Wall-Street Journal: April: Jobs Report: Jobs Market Shakes Off Winter Doldrums (08/05/15)

Other Articles of Interest:

Business Insider: Spain's Unemployment Rate Is Now Almost As High As US Unemployment In the Great Depression (02/05/12)

Business Insider: Facts about Ireland that shock Foreigners (26/02/15)