Why Olmert ordered a ground operation in Lebanon with the UN about to adopt a resolution ending the war

As I have noted, the main content of Wednesday's final report of the Winograd Commission is expected to be a recounting of the final sixty hours of the war. In the final sixty hours, the IDF was ordered by Prime Minister Ehud K. Olmert to undertake a ground operation - one he avoided undertaking during the entire month of the war up to that point - to reach the Litani River. The operation started