Thanagarian Invasion! Part 1: Hawk Vengeance.
There was a saying that revenge was a dish best served cold.  As he flew the night skies over St. Roch, Tharok began to understand exactly what that saying meant.  He had come to earth for one purpose and one purpose alone: to seek revenge upon she who had sullied his father's name and reputation--Shayera Hol.  Years ago she had been Thanagarian and loyal, an advance sent by the Thanagarian forces to assist in the invasion of the pathetic little planet Earth.  But she had betrayed Thanagar and betrayed the man she was bound to and the invasion force was sent back in shame.  None had borne the shame more than Hro Talak, Tharok's father.  The once-proud man spend the rest of his life disgraced, shamed, and shattered and Tharok refused to permit his father to die entirely a failure.  It had taken him years to work his way up in the Thanagarian forces and then years beyond that to convince the government to attempt a second Earth invasion but he had finally done it.  Tharok himself went first to gather information--and kill Shayera.

But upon arriving Tharok found something more interesting than just killing Shayera: her children.  A plot formed in his mind, one that would cause great suffering to Shayera, something that would haunt her the rest of her days.  MUCH more effective than killing her.  Rex Stewart and Nicolette Hall would pay for their mother's crimes.

Swooping down in the darkness, Tharok had gathered enough information.  Tonight was the night to act and with something of a gleeful smirk on his face, the true Thanagarian began to break into the Hawk's beloved museum.