US President Donald Trump on Tuesday lifted a travel ban imposed on Chadian citizens following a six-month government review.

According to the White House, the review found that the landlocked central African country had improved security standards and bolstered communication about its citizens with US authorities.

Read more: Trump's travel ban 3.0 'more likely to survive a court challenge'

"We welcome the improved practices by the Chadian authorities, which demonstrate a clear off-ramp for countries placed on the travel restriction list," said the US State Department. "These improvements will improve security for the people of Chad and the United States."

The White House said Chad had increased cooperation with US security bodies and dealt with deficiencies in vetting citizens leaving the country. One of the reasons given for Chad's inclusion in the ban was its inability to supply homeland security officials with recent passport samples.

Controversial ban

Chad was among eight countries targeted by a travel ban on its citizens. The others include Iran, Libya, Syria, Somalia, Yemen, Venezuela and North Korea.

In a statement, Trump said the other seven countries "did not make notable or sufficient improvements in their identity-management and information-sharing practices" and consequently would remain on the list.

Trump's critics have accused the US president of imposing unconstitutional measures against citizens of other countries by predominantly targeting Muslim-majority countries. Two of Trump's travel bans were suspended by US courts.

Chad is considered a key US ally in the war on terror. The US maintains a drone base in Chad, where it launches attacks on extremist groups, including Boko Haram. A month ago Rex Tillerson made a fleeting visit to the country as part of his tour of African nations in his role as US secretary of state. During the security-focused trip, he faced questions from Chadians over the travel ban. Tillerson was fired by Trump upon returning from Africa.

Chad - a country with unknown wealth Chad- a country with unknown wealth Chad, a country in central Africa, is often equated with violence and instability. It remains one of the poorest countries in the world - despite huge oil deposits. But the commodities boom also hides the view of its almost unknown wealth. A journey of discovery in pictures.

Chad - a country with unknown wealth Time Zone in the Ennedi Plateau Time seems to stand still on the Ennedi Plateau, a sandstone desert in the northeast of the country. Here, people and animals live their lives in harmony with the natural rhythms of days and years. There’s no rush, no counting of minutes. Time does pass but at a different speed.

Chad - a country with unknown wealth Survivors Kalait is the last trading post before the great desert to the north. Only sand and dust are seen here. A scorching sun, aridity and temperatures above 50 ° are not uncommon around here. Living in this environment is unimaginable. Nevertheless, there are living creatures who defy the harsh conditions of the desert.

Chad - a country with unknown wealth Source of Life Guelta d'Archei is probably the Sahara’s most famous watering hole. It lies in the middle of the rocky Ennedi Plateau. To reach this place one needs a camel or jeep. This natural source of water is the basis of life for plants, animals and humans. The Guelta d'Archei bears witness to the past, to a time when the area was once greener and home to the Nile crocodiles. Today only a handful remain.

Chad - a country with unknown wealth Migrating herds Millions of animals such as cattle, camels, goats and sheep make up a large part of the country's inhabitants. For many Chadians, cattle means wealth and a safe investment which can be sold whenever necessary. The animals can be seen at water points, wells, roads and markets.

Chad - a country with unknown wealth Fertile fields Rice is one of the major grains grown in the fertile plains of the river Logone in southern Chad. Logone is the second largest river in the country. Every year it provides the Chadian population with arable land, ensuring the nutrition of whole towns and villages. Every year, 150,000 tones of rice are sown and harvested by hand from this area alone.

Chad - a country with unknown wealth White Gold Chad is dependent on oil. But the most important export commodity is cotton. The state enterprise 'Coton Tchad' buys handpicked balls, cleans them and then exports the cotton. Many villages in the south of the country have brought some prosperity and independence to their households through the cultivation of cotton that is practiced on a monoculture basis.

Chad - a country with unknown wealth Connected to home Gaoui is a village located ten kilometers northeast of the capital N'Djamena. Human beings and nature seem to be one here. Traditions and shared ethnic and linguistic roots hold the villages together – so strongly that even former residents help make their village a better place for future generations.

Chad - a country with unknown wealth Handwork Under the scorching sun, farmers work near the eastern city of Biltine. Most own one or two acres of fields. From sowing and harvesting, to drying and threshing - everything is done by hand. Some produce, such as peanuts, is cultivated by women. At the end of the rainy season everybody joins in to harvest the crops.

Chad - a country with unknown wealth Market day Almost everything is traded in Abeche: millet, maize, rice, cassava, beans, bananas, papayas - depending on the season. The town, which borders Sudan, is traditionally one of the most important commercial hubs of the Sahel. Traders come here to sell their cattle, spices, oil, milk and baskets. Sometimes there are also modern imported goods. At the end of market day it's time to celebrate.

Chad - a country with unknown wealth Wisdom The average life expectancy of the Chadian population is 48 years. The older the person, the greater the respect from the community. Traditionally they act as judges and pass on their valuable experience, their stories and values. Their faces convey dignity and wisdom.

Chad - a country with unknown wealth Future generations The average age of the population is 16.3 years. Most Chadians regard children as their greatest wealth. They exist only in the plural, there are no individual children. At Gagal in the southeast of Chad, they form the majority of the population. Chad’s young people represent tremendous potential for new ideas and the future. Author: Albrecht Harder/im - Editor: Susan Houlton



ls/se (Reuters, AFP, AP)