Events January January 1 United Nations Secretary-General Kurt Waldheim heralds the start of the International Year of the Child. Many musicians donate to the Music for UNICEF Concert fund, among them ABBA, who write the song Chiquitita to commemorate the event. The United States and the People's Republic of China establish full diplomatic relations. Following a deal agreed during 1978, French carmaker Peugeot completes a takeover of American manufacturer Chrysler's European operations, which are based in Britain's former Rootes Group factories, as well as the former Simca factories in France. January 7 – Cambodian–Vietnamese War: The People's Army of Vietnam and Vietnamese-backed Cambodian insurgents announce the fall of Phnom Penh, Cambodia, and the collapse of the Pol Pot regime. Pol Pot and the Khmer Rouge retreat west to an area along the Thai border, ending large-scale fighting. January 8 – Whiddy Island Disaster: The French tanker Betelgeuse explodes at the Gulf Oil terminal at Bantry, Ireland; 50 are killed. January 9 – The Music for UNICEF Concert is held at the United Nations General Assembly to raise money for UNICEF and promote the Year of the Child. It is broadcast the following day in the United States and around the world. Hosted by the Bee Gees, other performers include Donna Summer, ABBA, Rod Stewart and Earth, Wind & Fire. A soundtrack album is later released. January 16 – Shah Mohammad Reza Pahlavi flees Iran with his family, relocating to Egypt after a year of turmoil. January 19 – Former U.S. Attorney General John N. Mitchell is released on parole after 19 months at a federal prison in Alabama. January 22 – Uganda–Tanzania War: Battle of Mutukula: The Tanzanian military captures the Ugandan border town of Mutukula after a short battle. January 25 – Pope John Paul II arrives in Mexico City for his first visit to Mexico, mainly for 1979's Latin American Episcopal Conference (CELAM) or Conference of Puebla. January 28 - Deng Xiaoping arrives in Washington, D.C. for the first visit of a paramount leader of the People's Republic of China to the United States. February February 1 - Ayatollah Ruhollah Khomeini returns to Tehran, Iran after nearly 15 years of exile. February 3 – Ayatollah Khomeini creates the Council of the Islamic Revolution. February 7 Iranian Revolution: Supporters of Ayatollah Khomeini take over the Iranian law enforcement, courts, and government administration; the final session of the Iranian National