"Silicon photonics for years was an oxymoron, " said JoeCampbell, a specialist in the field who is a professor of electrical and computer engineering at the University of Virginia.
Members of the special-operations forces who conducted the strike met President Barack Obama and Vice President Joe Biden on Friday at Fort Campbell, Ky.
Ireland's John Joe Nevin and Great Britain's Luke Campbell will battle for the gold in the bantam 56-kilogram event Saturday night after winning through their respective semifinals.