Charles Pratt, liaison officer from the U.S. Department of Homeland Security, will give a public presentation on the challenges associated with status compliance at 2 p.m. Tuesday, Oct. 12, on H-1B issues, and 3 p.m. on F-1 and J-1 issues in 218 Hubbard Hall. He is highly qualified to answer any questions international employees, students or visitors may have. U.S. citizens also are invited, as they can also learn a great deal from this presentation.