The 1993 Chemical Weapons Convention goes into effect. Russia, Iraq and North Korea were notable nations who had not ratified the treaty.


	September 8

April 28th in the Year 1997

The 1993 Chemical Weapons Convention goes into effect. Russia, Iraq and North Korea were notable nations who had not ratified the treaty.

1997 - The 1993 Chemical Weapons Convention goes into effect. Russia, Iraq and North Korea were notable nations who had not ratified the treaty.

Other events that occurred in the year 1997...
Other events that occurred on April 28th...

SOURCE: Wikipedia, The Free Encyclopedia (http://en.wikipedia.org)