It took a bombing which killed 51 Iraqis for NBC anchor Brian Williams to acknowledge “there's been a letup in the violence of late in Iraq.” Unlike his ABC and CBS colleagues, two weeks and a day earlier Williams failed to report the death toll for Americans in Iraq in May was the lowest for any month since the war began. On Tuesday night, however, he announced: Last night here we reported there were more Americans killed in Afghanistan than in Iraq in the month of May. It's generally believed there's been a letup in the violence of late in Iraq. That is until today. From Baghdad, Jim Maceda reported on the deadly bombing in a shopping area, but then he contrasted the incident with improving Iraqi expectations: Not only did the blast break the relative calm here, but it shattered a growing sense of security as well. After three to four months of relative low violence, people were starting to come out into streets, returning to schools, stores and banks were opening. On ABC's World News on Tuesday night Charles Gibson read a short item on “the deadliest attack of its kind in over three months.” The CBS Evening News didn't air anything about it. (Last week, on Monday, June 9, the NBC Nightly News did air a piece from Maceda on how U.S. soldiers in Dora are getting more information from Iraqis on how to locate weapons and that banks and clinics are open again in the community.) My June 16 NewsBusters item , “Williams: Afghanistan D ...