What did one member of the third set of co-anchors for "American Morning'" specialize in? 
American Morning:  The show's next permanent co-anchors were Soledad O'Brien and Miles O'Brien, who fronted the show from 2003 to 2007. Miles O'Brien (journalist): Miles O'Brien (born June 9, 1959) is an independent American broadcast news journalist specializing in science, technology, and aerospace.
science, technology, and aerospace.