The journey was delayed by moving in single - file through a field of Thermos bombs .
The brigade took until 4 : 00 p.m. to cover the 40 mi ( 64 km ) to Antelat , where they came into the range of Combforce wireless transmissions .
The journey was delayed by moving in single - file through a field of Thermos bombs and the brigade took until 4 : 00 p.m. to cover the 40 mi ( 64 km ) to Antelat , where they came into the range of Combforce wireless transmissions .