11.   Researchers said they were able to pinpoint the origin of the axes to within a few hundred miles.

12.   The early detection of another outbreak could be the key to pinpointing its origin, confirming the cause and maybe finding a cure, according to Dowell.

13.   U.S. radar can pinpoint origin of shelling.

14.   Annink said UN observers deployed in the region have set up a radar to pinpoint the origin of the shelling.