Seattle Times staff reporter
The ad, purchased by the Seattle Mideast Awareness Campaign, ties alleged Israeli war crimes to U.S. military aid. The ad had been set to run for a month on the sides of 12 buses starting next week.
Metro also rejected proposals for two counter ads.
"The escalation of this issue from one of 12 local bus placards to a widespread and often vitriolic international debate introduces new and significant security concerns that compel reassessment," said King County Executive Dow Constantine.
http://seattletimes.nwsource.com/html/localnews/2013753552_busads24m.html