The site navigation utilizes arrow, enter, escape, and space bar key commands. Left and right arrows move across top level links and expand / close menus in sub levels. Up and Down arrows will open main level menus and toggle through sub tier links. Enter and space open menus and escape closes them as well. Tab will move on to the next part of the site rather than go through menu items.
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On August 9, 2001, during a speech from his ranch in Crawford, Texas, President George W. Bush put an end to several months of debate surrounding government funding of research on stem cells derived from human embryos.
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