in 2005, but the paper revealed they had checked the story with Clark. She confirmed this, but denied that she had made attempts to get Doone to resign and defended being the source as "by definition I cannot leak". Clark also responded by saying that National supporters had funded Doone's defamation-suit. Opinion on the significance of this incident varied. In 2000, Labour MP Chris Carter investigated the background of one of Clark's Cabinet colleagues, Māori Affairs Minister Dover Samuels, regarding allegations of historic statutory rape. Ex-convict John Yelash claimed that Carter had approached him to help with the investigation; a claim that Carter denied. Clark backed her MP, referring to Yelash as a "murderer" when he had in fact been convicted of manslaughter, a less serious offence. Yelash sued Clark for defamation, resulting in an out-of-court settlement. In April 2001, Clark met with Chinese President Jiang Zemin during an official visit to Beijing. Jiang referred to the Prime Minister as an "old friend". He stated that China hoped to "establish bilateral long-term and stable overall cooperative relations [with New Zealand]". Clark strongly supported China's entry into the World Trade Organization. In March 2002, Clark made her first visit to the United States as Prime Minister. She visited "Ground Zero", the former site of the World Trade Center, where the New York City Police Department presented her with a New Zealand flag that had been recovered from the rubble after the September 11 attacks. On 26 March, Clark visited the Pentagon and Washington, D.C., where she met with American officials, including a private meeting with President George W. Bush. Most of the agenda for Clark's visit focused on the joint counter-terrorism campaign (dubbed the "War on Terror"). As Opposition Leader in 1998, Clark signed her name to a canvas that had been painted on by another artist. The painting was subsequently auctioned to charity. After the act came to light in April 2002, the opposition National Party referred the matter to the Police. A police report found evidence for a prima facie case of forgery, but determined that it was not in the public interest to prosecute Clark. In June 2002, Clark apologised on behalf of New Zealand for aspects of the country's treatment of Samoa during the colonial era. Clark's apology was made in Apia during the 40th anniversary of Samoa's independence and televised live to New Zealand where Samoans