Justice League of America #219

"Crisis in the Thunderbolt Dimension! Part One"

The annual meeting between the JLA and JSA starts in the JLA's satellite headquarters. Later on Earth-One, heroes from the JLA begin to get knocked unconscious (save Black Canary and Red Tornado, Earth-Two immigrants), plus those on the satellite by Johnny Thunder's Thunderbolt, attacking, unresponsive to his JSA allies. Black Canary, alongside Starman and Sargon, go to the T-Dimension, while the JSA'ers fight the Crime Champions on Earth-One. The three heroes are shocked when they find Earth-One's Johnny Thunder there and two glass coffins, containing Larry Lance and another Black Canary.