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The traceroute from SLAC to Kenya went via ESnet to Sunyvale, then via Level3 to New York and London and thence to Kenya. The RTT between London and Kenya was about 200ms.
On Aug 1, 2009 at about 23:00 hours GMT the RTTs averaged over a day, from SLAC to www.ternet.or.tz ch changed from about 730ms to about 350ms, see below: 
However after a day or so the RTT reverted back to the former value. A traceroute when the RTTs were long shows the route going via Telia and the Newskies satellite network.