diff --git a/README.md b/README.md
index 38e344a..3d15961 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,9 @@ other notable place.
 The bot takes a screenshot of the aircraft as it currently appears on
 the ADS-B Exchange's "Global Radar View" web page.
 
-This code currently powers the following bots:
+This code currently powers [13
+bots](https://twitter.com/i/lists/1263724487435890688), including the
+following bots:
 
   * [@SkyCirclesLA](https://twitter.com/SkyCirclesLA), which covers
     the Los Angeles metro area.
@@ -35,6 +37,11 @@ This code currently powers the following bots:
     Francisco Bay area.
   * [@SkyCirclesDC](https://twitter.com/SkyCirclesDC), for the
     Washington D.C. area.
+  * [@SkyCirclesR2508](https://twitter.com/SkyCirclesR2508), for the
+    R-2508 airspace complex over Edwards Air Force Base.
+  * [@SkyCirclesNTTR](https://twitter.com/SkyCirclesNTTR), for the
+    Nevada Test and Training Range (including Groom Lake/ Area 51).
+
 
 ## Technologies used
 
@@ -56,9 +63,9 @@ aircraft on the ADS-B Exchange "global Radar View".
 The bot will consider an aircraft to be "circling" if:
 
 1. In the past 25 minutes, the sum of the aircraft's bearing changes
-   is more than 1440 degrees. Port turns cancel out starboard turns
-   and vice versa--there needs to be a net change of at least 1440
-   degrees in one direction.
+   (while in the air; not on the ground) is more than 1440 degrees.
+   Port turns cancel out starboard turns and vice versa--there needs
+   to be a net change of at least 1440 degrees in one direction.
 
 2. The centroid of the last 3 minutes worth of positions must be more
    than 2.5 km away from all known airports.
@@ -128,12 +135,6 @@ radius-km: 10
 basestation-sqb: clean-basestation.sqb
 ```
 
-
-
-Create an initial history database:
-
-`echo '{}' > advisory-circular.db`
-
 Make sure you have at least Node version 10.0.0 installed, and then
 install the node dependencies:
 
@@ -156,7 +157,7 @@ more than once every 10 seconds.
 * **Do not run the script with a large radius, or adsbexchange.com will
   ban your IP.**
 
-* **Do not run the script more often than once every 10 seconds, or
+* **Do not run the script more often than once every 15 seconds, or
   adsbexchange.com will ban your IP.**