Patent pending system we can bring sexy back to construction. This mans promises of high speed construction at low cost got President Trumps attention, and his company was recently awarded about 2 billion worth of contracts to build a border wall. 60 minutes has been investigating the company and its record of building, and lets just say we found some holes in it that taxpayers will want to know about. ticking the living world is a unique and spectacular marvel. In his stunning new film, Sir David Attenborough celebrates natures wonders, a warning against humans overrunning the Natural World itself. You call the film a witness statement. A witness statement is given when a crime has been committed. Yeah, well, a crime has been committed. And and it so happens that im of such an age, that i was able to see it beginning. ticking im lesley stahl. Im bill whitaker. Im Anderson Cooper. Im sharyn alfonsi. Im scott pelley. Those stories and more, tonight, on 60 minutes. ticking people everywh