Border Patrol Tactical Units (BORTAC) are carrying M4 rifles with silencers, which are often used by the US military's special operators on secret missions, and holographic sights.
The M4s have PEQ-15 infrared sights that are used in tandem with night vision-goggles.
BORTAC agents are also wearing masks, noise-cancelling headsets, the US Army's latest Operational Camouflage Pattern uniforms, and are even carrying extra rifle magazines.
Other Border Patrol units are training in riot gear.
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Others in armored vehicles.
Others are in helicopters, sitting shoulder to shoulder as if preparing for a tactical insertion, as the Washington Post noted.