AGOA has resulted in limited successes in some countries. In addition to growth in the textile and apparel industry, some AGOA countries have begun to export new products to the United States, such as cut flowers, horticultural products, automotive components and steel. While Nigeria and Angola are the largest exporters under AGOA, other countries, particularly South Africa's have been more diverse and unlike the former are not mainly concentrated in the energy sector. To some countries, including Lesotho, Swaziland, Kenya and Madagascar, AGOA remains of critical importance. Agricultural products are a promising area for AGOA trade; however much work needs to be done to assist African countries in meeting U.S. sanitary and phytosanitary standards. The U.S. government is providing technical assistance to AGOA eligible countries to help them benefit from the legislation, through the U.S. Agency for International Development (USAID) and other agencies. The U.S. government has established three regional trade hubs in Africa for this purpose, in Accra, Ghana; Gaborone, Botswana; and Nairobi, Kenya.