NGSPB hosts special guest speaker John Harpole, President and Founder of Mercator Energy. Mr. Harpole will give insight into the roote cause of the Texas energy disaster. Date: Tuesday, April 13 Time: 11:30 am – 1:00 pm Location: Midland Petroleum Club Speaker: John Harpole Cost: $35 for members and $40 for guests (credit cards and…