You can use a timeline like this to lay out the history of FDA approval regarding aspertame.
Text in this example:
New FDA commissioner overrules the Public Board of Inquiry, ignores the recommendations of internal FDA team and approves NutraSweet for dry products. July 15, 1981
FDA announces petition of approval by General Foods for Aspartame October 15, 1982
NSDA urges FDA to delay approval of Aspartame due to its unstable nature in liquid form July 8, 1983
NSDA drafts objection to the approval of aspartame as sweetener in soft drinks July 8, 1983
Suit filed against approval of Aspartame based on unresolved safety issues August 8, 1983
First carbonated beverages sweetened by aspartame sold in USA September 1983