Those expert trackers have got to be part of the pack.

And now they've even started using these devices speaking of cool technology these little devices, little GIS trackers like this, which they put into the vaccine carriers of their vaccinators.

We know for example that we now have specialized eye trackers and infrared brain scans, MRI's that can decode the signals that our bodies send out when we're trying to be deceptive.

Current projections are that Apophis, which was discovered in 2004, will orbit near the earth several times between 2029 and 2036. In October 2009, near Earth object (NEO) trackers Steve Chesley and Paul Chodas of NASA's Jet Propulsion Laboratory in Pasadena, California, placed the odds of Apophis striking Earth in 2036 at about one in 233,000, lower than previous estimates.