"Wow." That was astronaut Tammy Jernigan's stunned reaction last night when she viewed a photo of what appears to be space shuttle Columbia getting zapped by a purplish electrical bolt shortly before it disintegrated Saturday morning. Former astronaut Tammy Jernigan "It certainly appears very anomalous," Jernigan told the San Francisco Chronicle. "We sure will be very interested in taking a very hard look at this." The photo was one of five captured by an amateur astronomer in San Francisco who routinely snaps pictures of shuttles when they pass over the Bay area. The pictures were taken just seven minutes before...