The ISN broadcast contains a segment introduced by a graphic with voice over: "This Year In History". However, the segment proceeds to list items about this *day* in history, items introduced by phrases like: "And 100 years ago today..."
Earth gov has previously declared a quarantine on Babylon 5, yet the ISN team just flies into B5 and back to Earth without a problem. The quarantine does not apply in this case, because the ISN team was on a government-sanctioned visit (for the much needed propaganda, as we learn in the end), so they had a special permit to pass the blockade.