A year after Pakistan's Benazir Bhutto was assassinated, thousands have gathered in her home town of Garhi Khuda Bakhsh to pay their respects. The former prime minister was killed in a suicide bombing and gun attack after she left an election rally in Rawalpindi. Investigations into her murder suggest an al-Qaeda-linked militant was responsible, but the new Pakistan coalition government - led by Bhutto's widower Asif Ali Zardari - has called for a UN-led inquiry into her assassination.