Maj. Gen. James W. Lukeman, Training and Education Command commanding general, greets the USO volunteers at the mobile trailer during the TECOM annual Family Day Picnic at Barnett Field, Aug. 27. The USO trailer is a troop support center on wheels, which offers satellite television, sitting area, kitchen and internet access. - Maj. Gen. James W. Lukeman, Training and Education Command commanding general, greets the USO volunteers at the mobile trailer during the TECOM annual Family Day Picnic at Barnett Field, Aug. 27. The USO trailer is a troop support center on wheels, which offers satellite television, sitting area, kitchen and internet access.