On February 18, 2008, "USA Today" stated that "the U.S. effort has shown more success" and that, after the number of troops reached its peak in fall 2007, "U.S. deaths were at their lowest levels since the 2003 invasion, civilian casualties were down, and street life was resuming in Baghdad." In light of the significant reduction in violence and as the surge brigades began to redeploy without replacement, Petraeus characterized the progress as tenuous, fragile, and reversible and repeatedly reminded all involved that much work remains to be done. During an early February trip to Iraq, Defense Secretary Robert Gates endorsed the idea of a period of consolidation and evaluation upon completion of the withdrawal of surge brigades from Iraq.