My hands were shaking. The man who had written this note was now as cold as the morgue table he was living on, if indeed he was lying in a morgue. No one had been able-or willing-to tell me where my friend's body would be taken. And now the white powder. Would Fielding have put powder in the envelope and neglected to mention it in his letter? If he didn't, who did? Who but the person who had murdered him?

I laid the letter on the sofa, stripped off the surgical gloves, and rewound the videotape to the point at which I'd walked out of the frame. I had decided to make this tape because I feared I might be killed before I could tell the president what I knew. Fielding's letter had changed nothing. Yet as I stared into the lens, my mind wandered. I was way ahead of Fielding on calling my "late brother's friend." The moment I'd seen Fielding's corpse on the floor of his office, I knew I had to call the presi¬dent. But the president was in China. Still, as soon as I got clear of the Trinity lab, I'd called the White House from a pay phone in a Shoney's restaurant, a "safe" phone Fielding had told me about. It couldn't be seen by surveillance teams in cars, and the restaurant's interior geometry made it difficult for a parabolic microphone to eavesdrop from a distance.

When I said "Project Trinity," the White House oper¬ator put me through to a man who gruffly asked me to state my business. I asked to speak to Ewan McCaskell, the president's chief of staff, whom I'd met during my visit to the Oval Office. McCaskell was in China with the president. I asked that the president be informed that David Tennant needed to speak to him urgently about Project Trinity, and that no one else involved with Trinity should be informed. The man said my message would be passed on and hung up.