Former Navy Lieutenant Ryan Graves said his crew saw the objects enter protected air space hundreds of times between 2015 and 2017. His comments come as the US government is in June expected to release a report on the sightingsFormer Navy Lieutenant Ryan Graves said his crew saw the objects enter protected air space hundreds of times between 2015 and 2017. His comments come as the US government is in June expected to release a report on the sightings