TOPSHOTS Thomas Frieden, director of the Centers for Disease Control and Prevention, listens to opening remarks before testifying at a House Energy and Commerce Committee Oversight and Investigations Subcommittee hearing on "Examining the US Public Health Response to the Ebola Outbreak" on Capitol Hill in Washington on October 16, 2014. Frieden has become the most prominent target of the criticism, which has mounted as a second Texas health care worker became infected with the deadly disease after treating a Liberian man who died of Ebola last week. AFP PHOTO/Nicholas KAMM