Marcus reports live on BBC World Service News from the US Naval Base at Guantanamo Bay where the suspect accused of plotting the attack on the USS Cole in Yemen in 2000 attended a pre-trial hearing. The bombing killed 17 US naval personnel. 

Illustrated report on the inauguration of of the Martin Luther King memorial on October 13, 2011 and broadcast on Radio 4 News programmes

Marcus reports live on BBC 5 Live ahead of the December 28 Iowa Caucus that kicked off the state by state contest for Republican nominees ahead of the US presidential election in 2012

Gauging the mood on Capitol Hill in late July 2011 as America cruised inexorably towards defaulting on its debt obligations and with no deal in sight between Democrats and Republicans