Army two years ago.” He held out his hand.

Hendricks hesitated and then shook. “Major Joseph Hendricks.”

“Klaus Epstein.” The other soldier shook with him, a small dark man with thinning hair. Epstein plucked nervously at his ear. “Austrian. Impressed God knows when. I don’t remember. The three of us were here, Rudi and I, with Tasso.” He indicated the woman. “That’s how we escaped. All the rest were down in the bunker.”

“And—and they got in?”

Epstein lit a cigarette. “First just one of them. The kind that tagged you. Then it let others in.”

Hendricks became alert. “The kind? Are there more than one kind?”

“The little boy. David. David holding his teddy bear. That’s Variety Three. The most effective.”

“What are the other types?”