Tonight on Nightly Business Report, the CEOs of two well-known companies are once again making headlines. On Capitol Hill, Apple CEO Tim Cook defends his company's tax strategy, as billions of dollars sit overseas. In Tampa, JPMorgan CEO Jamie Dimon wins a contentious shareholder vote and gets to keep both titles of Chairman and CEO. Also, NBR brings you the first in a series of reports on healthcare. Tonight, we'll look at how Watson, the supercomputer, is helping doctors fight cancer.