Articles written in the present day about past events are usually considered to be secondary sources. Use these databases to find journal articles about the topics of your annotated bibliography paper.
There are entire online databases full of reference material. Take a look at these:
The Ferris Wheel made its debut at the 1893 World's Columbian Exposition in Chicago. It was barely completed in time! From May to October 1893, the world's attention was focused on the exhibits and wonders in this Midwestern city.
(Attributed to the New York Times; Wikimedia Commons)