5 craft formation. One craft broke off and flew slowly and silently over our exact location.

Driving down the Dallas freeway we saw five craft that initially looked like aircraft lining up to land. After they stayed still and started to move off at 90 degree angles and flash on and off, and did not have additional aircraft lights, but were single orbs of light, we realized they were not normal aircraft. When we got back to the hotel, we continued watching the craft from the parking lot. One broke off and flew silently directly overhead at about 1,500 feet, at which point we could see a structure within the light. Craft continued to move slowly and silently past DFW airport and out of site. At times, they moved close to other aircraft and appeared to present a danger to aviation.