Through friends <a href=" http://sildenafilbuycheaponline.bid/maps/sitemap57.html#weird ">2340 levitra cialis viagra compare</a> The last few months have given us an opportunity to revisit the remarkable career of the UK&rsquo;s first woman prime minister. And in a life positively bursting with examples of arrogance, obstinacy, courage, hubris and conviction, for me there is one defining event that marked Margaret Thatcher out as someone who was destined to succeed: her unexperted decision, in 1975, to challenge Ted Heath for the leadership of her party.