| Tuesday 20 July 2010 at 10.30pm on BBC Two Presented by Kirsty Wark All eyes will be on the body language in Washington tonight between two new leaders. Ten weeks after taking office, David Cameron is there for his first White House visit as UK prime minister. Although the agenda was meant to centre on the BP Gulf of Mexico oil spill, the global economy and the UK government's proposed Afghan withdrawal date of 2015, the reignited row over the freeing of the Lockerbie bomber is now dominating the visit. Having initially refused, David Cameron will be meeting four US senators to discuss allegations BP lobbied for the release of Abdelbaset al-Megrahi. Peter Marshall is in Washington for Newsnight tonight and we hope to be speaking to Mike Hammer from Obama's National Security Council. We'll also be asking Simon Schama what he thinks will define Cameron and Obama's 'special relationship'. Then Jackie Long will be asking why the UK government has decided to simplify the UK tax law. And, in his first broadcast interview, we'll be asking the Cardiff councillor John Dixon about the tweet which has resulted in him facing a disciplinary hearing for calling the Church of Scientology "stupid". Do join Kirsty at 10.30pm on BBC Two. | 
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