Haitian Recovery Efforts

It's been six months since a devastating magnitude-7.0 earthquake hit Haiti, killing as many as 230,000 people and leaving more than a million homeless. Governments, aid agencies and individuals all responded swiftly to the disaster, pledging more than $5 billion in aid, but only two percent of that money has actually reached Haiti. The US Senate has expressed its concerns about how aid is being managed. What's gone wrong? Why have relief efforts stalled? Could the American government pull back on its pledge of help? What about other countries? What support has actually reached those in need?