Republican rivals make last-ditch bids to cut Trump's lead

Republican voters in the state of Iowa are preparing to take part in the caucuses that mark the first test of the US presidential election year.

Also in the programme: Bernardo Arevalo has been sworn in as Guatemala's new president after many hours of delay caused by wrangling among opposition MPs in Congress; and two Iranian women journalists have been charged for not wearing the hijab, a day after they were released from prison on bail.

(Picture: Former U.S. President and Republican presidential candidate Donald Trump speaks as he campaigns in Indianola, Iowa, U.S. Credit: Reuters)