Haiti is marking six months since the powerful earthquake that killed more than 220,000 people and left Port-au-Prince and surrounding areas in ruins.

The 7.0 magnitude earthquake on January 12 left some 1.5 million others homeless.  

Haitian Prime Minister Jean-Max Bellerive and former U.S. President Bill Clinton say millions of Haitians still lack access to basic services such as shelter, water, sanitation and health care.

In an opinion piece in The New York Times, they say progress has been made, but that all involved in Haiti's recovery must do better.

Mr. Clinton and Mr. Bellerive, who are the co-chairs of the Interim Haiti Reconstruction Commission, say that so far only 10 percent of the $5.3 billion pledged by governments to Haiti has been disbursed to the Haitian government.