Originally Posted by
seavisionburma
... They already are. Everyone traveling to the US under the VWP has been fingerprinted with photos taken since the US-VISIT program started in 2004. They've made some changes as to how many fingers are needed for prints since then (just 2 fingers until 2009, then all - though the agent often didn't ask for all 10 if you'd been before and the new automated kiosks only as for 5)