Two American journalists, Laura Ling and Euna Lee, were arrested after entering North Korea in 2009.

CNN: STORY HIGHLIGHTS

In one of the most high-profile cases, Mr Clinton negotiated the release in 2009 of two US journalists, Laura Ling and Euna Lee, who had been found guilty of entering North Korea illegally.

BBC: North Korea to issue verdict on US citizen

Since 2009, the elder Mr. Lee has been fighting a neurological disease that makes it difficult for him to walk, his daughter Lee Wei Ling, a neuroscientist, wrote in Singapore's Sunday Times in 2011.

WSJ: Singapore's Lee Kuan Yew Discharged From Hospital

Newly appointed chairman Lee Yun-ling left China Airlines after 24 years to head domestic airline Far East Transport, which is 25%-owned by the American International Group.

CNN: How to Repair a Carrier

"Such an arrangement will serve as a buffer for the chief executive and will ultimately help stabilize the SAR government, " says Lee Pang Kwong, a political scientist at Ling Nan College.

CNN: The Shift of Power