Loki Airport
Sadly, It's nowhere near as busy as it used to be. The UN's operation was limited to a single daily Dash 8 flying to Rumbek and Juba the last time I was there in 2009. East African withdrew commercial services last year and I believe the only surviving regular service from Nairobi is ALS with a daily Beech 1900 that routes via Lodwar. A few private operators still run flights into South Sudan from Loki.
The authorities opened a brand-new control tower in 2008 and published a whole set of RNAV SID's and STAR's that can be found in the Kenyan AIP.