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| Publisher |
DC |
| Writer |
Leo Dorfman |
| Penciler |
Curt Swan |
| Inker |
Murphy Anderson |
| Letterer |
John Costanza |
| Cover Artist |
Neal Adams |
| Published | May 1971 |
THIS HOSTAGE MUST DIE! / FEUD OF THE TITANS! Superman discovers that the red jewel is drawing energy from a red sun, and frees himself by blocking out its light; Then he discovers that Frank Haldane has found the treasure of Montezuma, and is attempting to steal it with a mechanical mole of his own design. Superman and Supergirl are made hostile to each other and goaded into a super-feud when fumes from a brainwash bomb they are disposing of in the Fortress of Solitude's disintegration pit combine with Kryptonian elements there and make them hate each other.
