Orson Scott Card. Angles.
Originally in: Angles, and other stories.
Card postulates multiple universes, with some having the capacity to flit between alternate timelines. The chance to move to other timelines to avoid religious strife, or national suffering, proves tempting. Against this backdrop is a story of one unscrupulous traveller across realities who finds he has been outsmarted by a group of Japanese.
The story doesn't really work that well, as it flits about rather too much, taking focus over the lead up to what would otherwise have been a dramatic conclusion. The dramatic conclusion is somewhat creaky, with the Japanase travellers, nekkid as the day they were born, overpowering armed guards through their martial arts.
Conclusion
With the SF community having being served for two decades by the Dozois annual collection, producing an anthology with only a dozen stories is going to be challenging. The Silverberg/Haber collection makes it even more difficult as the majority of the stories are from the first half of 2002. The volume also suffers by having no editorial introduction to each story, so for a lot of readers will lose out a little from not reading the story in the context of the author's work.
I'll reserve my judgment on this collection until I've read the other two annual collections.
copyright Mark Watson 19th April 2002