Passage: A recovered Blonsky joins Ross' forces for a third attempt to take Banner into custody. They succeed and Banner, along with Betty, are taken away in a helicopter. Blonsky stays behind and orders Sterns to inject him with Banner's blood, as he covets the Hulk's power. Sterns warns that the combination of the super-soldier formula and Banner's blood may cause him to become an "abomination", but Blonsky insists. The experiment mutates Blonsky into a creature with size and strength surpassing that of the Hulk, but drives him insane. He attacks Sterns, who gets some of Banner's blood in a cut on his forehead, causing him to begin mutating as well. In his new monstrous form, Blonsky rampages through Harlem.

Question: Immediately after Blonsky mutates (due to an encounter with Banner's blood) who does he attack?
Sterns