President Obama Knows What A Green Lantern Is
Barack Obama receiving a briefing about the Green Lanterns from Amanda Waller no less. From – Green Lantern Vol. 5 #13
How Aquaman Ended The US-Atlantis War
From – Aquaman Vol. 8 #15
The United States Declares War On Atlantis
The Atlantis army is actually part of N.E.M.O now headed by Black Manta. From – Aquaman Vol. 8 #12
Harley Quinn Wears A Green Lantern Ring
From – Harley’s Little Black Book #2
Superman Meets President Obama
– Superman-Wonder Woman #20