Tech firm apologises for hostess lampshade outfits

The largest cybersecurity company in the US has apologised for using two women posing with company-branded lampshades on their heads at a trade event in Las Vegas.They were meant to draw attention to Palo Alto Networks' sponsorship of a "CyberRisk Collaborative Happy Hour" at the Black Hat conference.But the publicity stunt has sparked a backlash, with critics calling it "sexist", "creepy" and "tone deaf".In a…