Sixteen minutes to ten
Thank God , they did n't challenge ! Lance went still lower . Finally , at a thousand feet , he set the helicopter props in motion and hung in mid-air -- directly above the very center of the city . Sixteen minutes to ten . Now ! * * * * * In the American front-line trenches , massed troops crouched expectantly . Clustered on every air base were flights of planes , each one crammed with bombs .