"We have never handled a more important, dramatic and emotionally compelling challenge, " he said in a statement.

NPR: APNewsBreak: Lawyers For Gay Marriage In Book Deal

And restoring health in the housing market after its dramatic collapse remains a difficult challenge.

WHITEHOUSE: Press Briefing

This long-standing challenge for customers is aggravated by dramatic increases in cost and complexity amid a rising tide of sophisticated, data-intensive workloads in an increasingly interconnected world.

ENGADGET: IBM's zEnterprise architecture makes mainframes cool again, also efficient (video)