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).
Your flight direction from Houston, TX to Killeen, TX is Northwest (-56 degrees from North). The distance calculator helps you figure out how far it is to fly from Houston, TX to Killeen, TX. It does this by computing the straight line flying distance (as the crow flies). It uses the great circle formula to compute the total travel mileage.