Planes, trains and travel bans

In 2002, illicit arms dealer Aleksic Jovan flew more than 200 tons of weapons in war-torn Liberia, contributing to a conflict estimated to have killed about 250,000 people. Years ago, Linda Kisuna's husband contracted a sexually transmitted disease. What do they have in common? Both Jovan and Kisuna's husband have been denied entry to countries across the world.