Originally Posted by GUWonder
... and how do you suggest this will help against hitherto unknown suicidal terrorists?
In theory biometric data is far harder to manipulate and falsify than the current documentation. One would assume that the data will be automatically cross referenced against a database of known or suspected individuals involved in terrorist activites and be flagged up if there's a match.
It will also help discount those people who are frequent business travellers from more intense scrutiny (or hopefully anyway).