Virtualization is the secret weapon that organizations can wield to battle the Big Data management challenge.

FORBES: Best Practices For Managing Big Data

The Borussia Dortmund star, who had to battle injury to play in Euro 2008, was hurt after a foul challenge from Czech defender Zdenek Grygera.

CNN: Sverkos gives Czech Republic opening win

Securing the long, porous border that divides Pakistan and Afghanistan has been a major challenge for the two countries as they try to battle insurgents, correspondents say.

BBC: Afghan militants ambush Pakistan troops in Upper Dir

For Arsenal the signs are growing that they can make a real challenge for the title this season, but Wolves are set to face a battle to stay in the top flight.

BBC: Wolves 1-4 Arsenal

The anticipatory period leading up to a performance of any sort is difficult for most performers, but there is a particular challenge involved in waiting to perform an act that is to some degree extemporaneous, and battle rap is a rather harrowing mix of the extemporaneous and premeditated.

FORBES: Behind the Scenes at World Domination II, Part One

Palin had beaten Murkowski in 2006 in a primary battle in which she campaigned as a reformer and backed an unsuccessful 2010 challenge to Murkowski's daughter, U.S. Sen.

CNN: E-mails: Palin moved to tie oil scandal to ousted rival

Before the headline-grabbing school prayer battle, which began as a shoot-from-the-hip challenge to her older son's Baltimore public junior high school, O'Hair had no assets of her own to speak of.

FORBES: Magazine Article

The Italian held off Andrea Dovizioso's challenge to break clear and win by more than one second, so the real drama was in the battle for second and third.

BBC: Valentino Rossi wins Qatar MotoGP as Stoner crashes out

The Second Circuit Court of Appeals today refused to issue an injunction against the streaming-TV service Aereo, intensifying the legal battle between the Barry Diller-financed startup and broadcasters who face a serious new technological challenge to their business model.

FORBES: Barry Diller's Aereo Streaming-TV Service Wins Big Ruling Against Broadcasters