Amid criticism of Michael Brown's qualifications, Homeland Security Secretary Michael Chertoff announced that Thad Allen will replace Brown as head of FEMA's ground operations. After an update from a reporter, two former homeland security employees discuss FEMA's organization and its…

After a background report on the debate in Congress over an additional $51.8 billion to fund disaster relief for Hurricane Katrina, two senators discuss the pending investigation into the federal response to the disaster and the growing debate about how…