Kate Adie presents stories from the US, Mexico, Bangladesh, Guatemala and Malaysia Donald Trump marked his return to the White House with a deluge of executive orders and announcements, which included an immigration crackdown, ending federal diversity programmes and withdrawing the US from the WHO. Anthony Zurcher travelled with the president on board Air Force One.

In cities across the US, the Immigration Enforcement Agency has been conducting raids and arresting thousands of undocumented migrants, as part of President Trump’s crackdown. Mexico is preparing itself for the potential arrival of tens of thousands of people in the coming weeks. Will Grant reports from both sides of the border.

In Bangladesh, deaths related to diseases, such as cholera and rotavirus are considered especially high, because of long-standing issues with overcrowding, poor sanitation and access to clean water. Rebecca Root visited a hospital in the capital, Dhaka, which is leading the way in treatment and prevention.

Many of Guatemala’s indigenous communities live outside the major cities, and the stress of living isolated lives has fuelled mental health problems. A group of indigenous women is trying to change that. Jane Chambers went to lake Atitlan to meet them.

The Malaysian state of Sabah, in northern Borneo, is a mountainous region covered in dense rainforest. On a recent visit there, Stephen Moss came across the increasingly rare black hornbill – and a new generation of keen birdwatchers.

Series Producer: Serena Tarling Editor: Richard Fenton-Smith Production coordinators: Katie Morrison & Sophie Hill