Such resettlement, however, presents an enormous challenge in restoring critical infrastructure, providing health care, and attending to psychological loss.
Senior commanders say they are mindful of the challenge in restoring security and stability, and in preparing for an Iraqi government to take control in July.
Peter Singer, a cybersecurity scholar at the Brookings Institution, said Alexander's replacement, Vice Admiral Michael Rogers, faced an enormous challenge in restoring the reputation of the NSA.
"The biggest challenge in restoring the building," said Sam White, the partner in charge of the project for the firm of Platt Byard Dovell White Architects, "was that it was originally built for single usage.
Analysts have generally applauded the creation of the risk council and the Identity Theft Coalition, but note that both groups have a considerable challenge in restoring the faith of consumers in the medium.
In fact, non-native species present a major challenge in restoring indigenous fire regimes to riparian ecosystems (see Pfeiffer and Voeks 2008; Pfeiffer and Ortiz 2007).
Asked if he dared to dream about the title, Henry admitted the challenge in restoring Liverpool's former glories was similar to the one facing them when they took over the Boston Red Sox baseball team in 2002 - and ended their 86-year wait for the World Series two years later.
Accordingly, for re-entrant/late users, a significant challenge exists in restoring the image contents of the teleconsultation session in such a way that all the participants maintain a consistent view of the medical images.
Also, the challenges Toyota faces in restoring profitability "are extensive, and include sluggish demand, overcapacity, the need to provide incentives beyond normal levels to boost sales, and a real risk that its product quality problems have eroded significantly and permanently its historical advantages in pricing power," Moody's said.
The scale of the challenge facing Fifa in restoring any degree of public trust is reflected in the poll's findings.
The figure highlights the huge challenges facing the UK in restoring stability to its public finances.
