On the 12th year of the horrific events of September 11th, the search engines are offering some level of remembrance for those who lost their lives. Google, Bing, Ask.com and others in the search industry have placed ribbons or powerful background images to pay tribute.
However, many are not happy with Google only placing a small black ribbon under the search box. The deal is, Google does not do logos for sad events - they only do them for happy events. So a ribbon, in Google's case, is appropriate. In fact, Google has only placed ribbons on their site since the beginning, you can see yourself by looking back at 2012, 2011, and 2010.
In any event, here the home pages of some of the search engines today.
Search Engine Roundtable:
Yahoo is missing a logo or tribute on their home page, as is DogPile.
Update: Dogpile added a tribute later in the day: