Communication , chain of command remain problem areas , Lee Hamilton says . Hamilton told the panel much progress has been made in the past 10 years , but more needs to be done : `` We are safer today , but not as safe as we could be . '' ` ` We can not permit delay , '' says Hamilton , co - chairman of the 9/11 Commission . ` ` delay is not a strategy , '' says former national security chief Tom Ridge .
Communication , chain of command remain problem areas , Lee Hamilton says . ` ` We can not permit delay , '' says Hamilton , co - chairman of the 9/11 Commission . ` ` delay is not a strategy , '' says former national security chief Tom Ridge .