Medical science, bolstered by research from the U.S.Environmental Protection Agency, shows a strong link between air pollution and heart disease and stroke.

VOA: standard.2010.08.04

The trip to China would be the North Korean leader's first in four years and Mr.Kim's first trip abroad since a suspected stroke in 2008.

VOA: standard.2010.05.03

Those comments echo earlier assessments by analysts here in Seoul, who say Kim Jong Il's apparent stroke about a year ago challenged perceptions of his complete command of the North's government.

VOA: standard.2009.06.22