`` It was a sound that neither one of them had ever heard before , '' Higgins said . NEW : Crews of US Airways Flight 1549 from icy Hudson River . They said aircraft was ' ` ` too low , too slow '' to risk returning to airport . Plane in air less than 30 seconds when collision occurred . One engine in ignition , one still attached , investigators say .
NEW : Crews of US Airways Flight 1549 from icy Hudson River . They said aircraft was ' ` ` too low , too slow '' to risk returning to airport . Plane in air less than 30 seconds when collision occurred . One engine in ignition , one still attached , investigators say .