travel. The specific border security measures taken by a jurisdiction vary depending on the priorities of local authorities and are affected by social, economic, and geographical factors. In India, which maintains free movement with Nepal and Bhutan, border security focuses primarily on the Bangladeshi, Pakistani, and Myanmar borders. India's primary focus with regard to the border with Bangladesh is to deter unlawful immigration and drug trafficking. On the Pakistani border, the Border Security Force aims to prevent the infiltration of Indian territory by terrorists from Pakistan and other countries in the west (Afghanistan, Iraq, Syria, etc.). In contrast, India's border with Myanmar is porous and the 2021 military coup in Myanmar saw an influx of refugees seeking asylum in border states including Mizoram. The refoulement of Rohingya refugees is a contentious aspect of India's border control policy vis à vis Myanmar. Meanwhile, American border security policy is largely centred on the country's border with Mexico. Security along this border is composed of many distinct elements; including physical barriers, patrol routes, lighting, and border patrol personnel. In contrast, the border with Canada is primarily composed of joint border patrol and security camera programmes, forming the longest undefended border in the world. In remote areas along the border with Canada, where staffed border crossings are not available, there are hidden sensors on roads, trails, railways, and wooded areas, which are located near crossing points. Border security on the Schengen Area's external borders is especially restrictive. Members of the Schengen Agreement are required to apply strict checks on travellers entering and exiting the area. These checks are co-ordinated by the European Union's Frontex agency, and subject to common rules. The details of border controls, surveillance and the conditions under which permission to enter into the Schengen Area may be granted are exhaustively detailed in the Schengen Borders Code. All persons crossing external borders—inbound or outbound—are subject to a check by a border guard. The only exception is for regular cross-border commuters (both those with the right of free movement and third-country nationals) who are well known to the border guards: once an initial check has shown that there is no alert on record relating to them in the Schengen Information System or national databases, they can only be subject to occasional 'random' checks, rather than systematic checks every time they cross the border. Additionally, border security in Europe is increasingly being outsourced to