Historical clue formulations

• Newspaper with the headline "Mystery Hero Saves Falling Space Plane" — 2016-08-18
• Clark Kent and Lois Lane's paper — 2013-08-05
• Publication that is the key to this puzzle's theme — 2008-01-22
• Where Lois and Clark work — 1995-02-14
• Perry's paper — 1994-06-27