Sen. Ted Cruz, worked a rare Senate overnight shift as he kept up a lengthy diatribe against Obamacare (with many digressions.) Evan Vucci/AP hide caption

itoggle caption Evan Vucci/AP

Boston Police Commissioner Edward Davis talks with reporters during the hunt for the Boston Marathon bombers in April. Michael Reynolds /EPA/Landov hide caption

itoggle caption Michael Reynolds /EPA/Landov

Boston Police Commissioner Edward Davis. Michael Reynolds /EPA /LANDOV hide caption

itoggle caption Michael Reynolds /EPA /LANDOV

Four-year-old Gabriella Diaz gets a flu shot at the Whittier Street Health Center in Boston, Mass., on Wednesday, the same day the city declared a public health emergency. Charles Krupa/ASSOCIATED PRESS hide caption

itoggle caption Charles Krupa/ASSOCIATED PRESS