The group from Ball State when on what's called a "person to person tour," one of several categories of travel Americans are permitted to take.
The founder of the pizza chain is a 1983 Ball State graduate.
Paul Ferguson has served as the university's president since 2014.
Letterman will be remembered in Muncie for the start he got on WBST radio, now home of Indiana Public Radio, while a student in the late 1960s.
The findings show that a higher use of TIFs reduces employment and the number of business establishments in a county.
Paul Ferguson, the current president at the University of Maine, will be Ball State University's 15th president.
Ball State University banned a class that taught intelligent design, and now Indiana lawmakers are questioning that decision.
A poll released this week by WISH-TV/Ball State University researchers says more than half of Hoosiers oppose the proposed constitutional ban on gay marriage.
Ball State University professor Chris Flook took pictures of all 92 Indiana counties' courthouses to bring attention to their historical significance.
The U.S. Supreme Court ruled Ball State is not liable because the person accused of creating a racially hostile work environment was not a supervisor.