Partitioned in 1947, Bengal was divided in half, creating East Pakistan - a satellite state ruled by Pakistan. It was an unwelcome occupation. In 1971, they fought a war of independence and East Pakistan became the People's Republic of Bangladesh. 37 years later, the first train ran between India and Bangladesh - the Maitree Express.
A look at a railway line which runs for just 20 miles from Janakpur in Nepal to Jaynagar junction in India, but which is now under threat of closure.
A look at the cross-border train known as the Samjhauta Express, which travels from Lahore to Delhi, and some of its passengers.