The exact cause of lichen planus is unknown. It may be related to an allergic or immune reaction. Risks for the condition include: Exposure to medicines, dyes, and other chemicals (including gold, antibiotics, arsenic, iodides, chloroquine, quinacrine, quinide, phenothiazines, and diuretics)
Closest Airport to Killeen, TX. The closest airport is Robert Gray Army Air Field Airport (GRK). Distance from Robert Gray Army Air Field Airport to Killeen is 11,1 kilometers (6,9 miles).
For other uses, see Killeen (disambiguation). Killeen is a city in Bell County, Texas, United States. According to the recent populations estimates, the city's population was 140,806, making it the 21st most populous city in Texas. It is the principal city of the KilleenâTempleâFort Hood Metropolitan Statistical Area.