"Silicon photonics for years was an oxymoron, " said Joe Campbell, a specialist in the field who is a professor of electrical and computer engineering at the University of Virginia.

WSJ: IBM Claims Breakthrough in Laser-Based Chips

O'Sullivan's next opponent will be Northern Ireland's Joe Swail, who overcame Marcus Campbell by the same 5-2 margin.

BBC: CHOOSE A SPORT

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.

WSJ: Spies Piece Together al Qaeda Playbook