VIA:  MarketWatch.Com HOUSTON, Feb 09, 2010 (BUSINESS WIRE) –Dr. Bernard A. Harris, Jr., the first African American to walk in space, and ExxonMobil announced today that more than 1,500 middle school students will participate in free science camps this summer. The ExxonMobil Bernard Harris Summer Science Camps will be hosted in 30 universities across the […]