Videographer from NBC affiliate KPRC-TV in Houston displays Mexican flag while covering an immigration march Saturday in Houston A cameraman for the NBC affiliate in Houston was captured on home video sporting a Mexican flag on his camera while covering a rally in the Texas city that supported illegal immigrants, drawing angry shouts from counter-protesters. In the first of two clips posted on YouTube.com, a counter-protester with a bull horn can be heard condemning the cameraman's flag. "Why does Channel 2 News have a Mexican flag on their camera?" the man asked. Houston's NBC station is KRPC. News director...