Robbery, assault wave is among worst in U.S.New York - Milwaukee is among the leaders in a spike in violent crime being reported this year in numerous cities across the country, according to figures presented at a conference here this week. In the first six months of 2006, robberies were up 36% and aggravated assaults were up 31.6% compared with the same period in 2005, according to a survey published by the Police Executive Research Forum. Of the 55 U.S. police departments in the survey, only Minneapolis had a higher combined increase in those categories.Certain cities, especially the largest, have...