As best I can tell there was no advance warning of the attack on the World Trade Center in 1993, which was the first significant foreign terrorist activity in the U.S. No tip-offs that it was coming.
“Many will view the compromises that will be made during your negotiations as painful concessions. But why not view them as peace offerings, ones that will provide in return the priceless gifts of hope, security and freedom for our children and our children's?”