BALTIMORE, MD – Charm City is once again among America's "Rattiest Cities," according to a new report from pest control company Orkin, although it has shown progress in each of the past two years. Baltimore comes in at No. 9 on the company's 2018 rankings released Monday.This is the fourth year that Orkin has compiled the rankings, which are based on the number of rodent treatments the company performed from Sept. 15, 2017 to Sept. 15, 2018. It includes both residential and commercial treatments.Baltimore dropped one slot from last year, when it was ranked eighth; two years ago it was...