Valerie Cooper worked as a Government official ("Special Advisor to the president on Superhuman and Mutant Affairs"). Val was having a catch-up with a reporter, who revealed that she had acquired a file about the history of mutants and that she was going to air with her report that day. Val played it cool, but left the meeting and tried to contact the president to let him know that the world was about to find out the United States government created mutants.
In the fallout of the announcement going public, Val fielded questions at a tense press conference. Afterwards, an unimpressed Val was met by Quicksilver, who warned her that there was going to be a lot of trouble now that the information about mutants' origins was public, and suggested to her that the United States government might handle this trouble using the mutant-tracking Cerebra technology.
When William Stryker Jr. launched an attack in New York, Quicksilver persuaded the president that he needed the Cerebra technology to deal with these threats. Despite Val's urgings, the president agreed. Val believed that what was transpiring couldn't be a coincidence and decided to look into Stryker’s past, soon discovering that Stryker himself was a mutant – with the ability to control machines. Though he was killed during the battle with his Sentinels, Stryker’s consciousness was transferred to the Nimrods.
Val scolded the president for his actions. When the Stryker-Sentinels launched an all-out attack on the United States, Val was in the White House and could only watch on in horror.
Valerie Cooper is allegedly allergic to pistachio, although it might have been a way to evade her conversation about the revelation of the mutants' origin.