The US Marines, Army and Air Force have switched a number of ads in the light of the terrorist outrages in New York and Washington DC. Some were deemed inappropriate because of their humorous approach.
However, the major impact of the attacks thus far on US armed forces advertising is to delay the outcome of the current joint recruiting advertising/marketing agency review. This will not now be resolved for at least six weeks and, in the interim, an extension of contract has been handed to incumbent Bates Worldwide, New York.
News source: Advertising Age - Daily Deadline