Comic Title: Justice League of America #17
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: February 1963
On Sale Date: December 13, 1962 Newsstand Date December 13, 1962
Source: House Ad, Flash #134, Page 17

Copyright Date December 13, 1962
Source: Library of Congress, Periodicals 1963

Frequency: Monthly, with the exception of Jan., April, July and Oct.
Cover Price: $0.12
Page Count: 32
Circulation: 340000
Editor: Julius Schwartz

Title: "The Triumph of the Tornado Tyrant"
Pages: 25

Feature(s):
Justice League of America (of Earth-1)

Writer: Gardner F. Fox
Penciller: Mike Sekowsky
Inker: Bernard Sachs

Reprinted In:
DC Special Blue Ribbon Digest #11 (1981)
Justice League of America Archives Vol. 3 HC (1994)
Showcase Presents:Justice League of America Vol. 2 TPB (2007)
Justice League of America Omnibus Vol. 1 HC (2014)
Justice League of America:The Silver Age Vol. 2 TPB (2017)

Feature Character(s)

• Justice League of America (last appearance in Justice League of America #16; next appearance in Justice League of America #18)
• Superman (last appearance in World's Finest Comics #131; next appearance in Superman's Girl Friend, Lois Lane #39)
• Batman (last appearance in World's Finest Comics #131; next appearance in Detective Comics #312)
• Flash (last appearance in Flash #134; next appearance in Flash #135)
• Wonder Woman (last appearance in Wonder Woman #135; next appearance in Wonder Woman #136)
• Green Lantern (last appearance in Green Lantern #18; next appearance in Green Lantern #19)
• Martian Manhunter (last appearance in Detective Comics #311; next appearance in Detective Comics #312)
• Aquaman (last appearance in World's Finest Comics #131; next appearance in World's Finest Comics #132)
• Green Arrow (last appearance in World's Finest Comics #131; next appearance in World's Finest Comics #132)
• Atom (last appearance in Atom #5; next appearance in Justice League of America #18)

Supporting Character(s)

• Snapper Carr (last appearance in Justice League of America #16; next appearance in Justice League of America #18)

Villain(s)

• The rockmen of Pluto (alien invaders; no further appearances)
• The Tornado Tyrant II (an evil duplicate of the Tornado Champion; next appearance in Justice League of America #193)

Other Character(s)

• The Tornado Tyrant (becomes the Tornado Champion and transforms itself into duplicates of the Justice League members in this story; last appearance in Mystery in Space #61; next appearance in Justice League of America #64)

Cameo Appearance(s)

• Adam Strange (in flashback)
• Alanna (in flashback)
• Kanjar Ro (in flashback to Mystery in Space #75)
• Doctor Light (in flashback to Justice League of America #12)
• Ulthoon (in flashback to the first story of Mystery in Space #61)
• The Mechanimen (in flashback to the first story of Mystery in Space #65)

Synopsis:
After its defeat by Adam Strange, the creature known as the Tornado Tyrant turns to good, and becomes known as the Tornado Champion. Creating its own duplicate Earth, it transforms itself into duplicates of the Justice League members, and wages war on evil. However, when an evil counterpart of itself springs into existence, it is unable to defeat this nemesis. Traveling to Earth, it subjects the JLA to identical perils to learn how to win such battles.

Green Lantern defeats the whirlwind menace by using anti-energy, which presents the Tornado Champion with a dilemma, for such a method would result in its own destruction. Coming up with his answer, the Champion returns to its own Earth, and causes the Tornado Tyrant to be teleported into the Anti-Matter Universe, where it is wiped out.