More than 3,400 Americans have died in Iraq since the war began four years ago. That's two per day, a rate that has increased with the "surge" of 30,000 U.S. troops into Baghdad earlier this year. Those forces have moved out of their relatively secure strongholds in the capital and scattered in smaller units into more dangerous neighborhoods to patrol and live. Since the surge began, sectarian violence among Iraqis has declined slightly in Baghdad, but U.S. casualties have increased, as President George W. Bush predicted. So has the frequency of grievous single days when multiple service members are killed.
April...