News roundup: US economy grew at 3.9% rate in Q3 … New FDA rules will put calorie counts on menus … Top 400 US households got 16% of all capital gains in 2010

Upon closer review: The U.S. economy grew at a solid 3.9% annual rate in the July-September period, even faster than first reported, giving the country its strongest back-to-back quarters of growth in…