What would you do if someone made false allegations online about your home city? Would you go into battle on social media? You would if you're my guest on this episode. Dan Kaszeta was so annoyed by the suggestions that his adopted city of London had 'no go' zones, that he disproved it and then took on others who, with no basis, suggested he was wrong. Dan isn't just an internet troll hunter, he's also a world expert in nerve agents, which form the subject of his latest book.I like having an eclectic mix of guests on the show and Dan is precisely that. Learn about his background working in the highest level of the US government and his various and varying areas of expertise. The newspaper article that featured Dan's tweet on the (not a) 'No Go Zone' of Tower Hamlets is here: https://metro.co.uk/2018/02/05/fearless-security-expert-risks-life-venturing-london-sharia-no-go-zone-7288616/You can find him on Twitter @dankaszetaTo read Dan's amazing biography visit: http://strongpointsecurity.co.uk/about/staff-bio/For more on his book Toxic visit his website: http://strongpointsecurity.co.uk/toxic/In the episode, Dan compares himself to Fred Dibnah. For the uninitiated, here's who Fred was: https://en.wikipedia.org/wiki/Fred_Dibnah