When sophisticated cyberspies have access to a network for many months, they often take measures to cover their tracks and to conceal what they have stolen.

WSJ: Chinese Hackers Hit U.S. Chamber

But the West remains deeply suspicious and alarmed at what it fears is subterfuge and deliberate procrastination to conceal Iranian plans to be able to make weapons from its uranium stocks, and therefore the Western demand remains that Iran must suspend nuclear enrichment.

BBC: Iran in 'backroom offers' to West

She also said she took clandestine trips to pick up and drop off what she assumed were doping products, and that she bought Armstrong makeup to help conceal a bruise from a syringe injection.

CNN: The claims, the attacks, the legacy: 12 Lance Armstrong quotes to know

The real America remains in the claws of two foreign conflicts that have been morally and practically contentious from the start, so what can fictional Americans do to heal, or temporarily conceal, such wounds?

NEWYORKER: Out There

Perhaps most troubling, however, is what Morton Halperin's current efforts -- and those of his partisans -- to conceal or dissemble about his record of defending, assisting, publicizing or otherwise promoting Philip Agee's treasonous activities says about the nominee's integrity.

CENTERFORSECURITYPOLICY: Center For Security Policy

It is a clear -- it is clear and concise in the ways in which the Iranian government has taken steps to conceal over many years what it's done.

WHITEHOUSE: Press Briefing