(12 Oct 2012) Hal Walker Jr., a pioneering African-American engineer, invented the laser technology Apollo 11 took to the Moon to measure the distance to Earth. The 79-year-old runs an after-school program to get minority students excited about science STORYLINE: HEADLINE Apollo engineer: Science not about being a geek --------------------------------------- CAPTION: Hal Walker Jr., a pioneering African-American engineer, invented the laser technology Apollo 11 took to the Moon to measure the