Nigerian police fired teargas at protesters in the capital Abuja and the northern city of Kano as thousands of people took to the streets across the country to protest economic hardships. Some security experts say militants belonging to Islamic extremist groups such as al-Qaeda and Islamic State may have undergone military instruction in South Africa under the guise of being trained as security guards. U.S. President Joe Biden says his government worked with allies to arrange a prisoner swap with Russia, including three Americans and one U.S. resident.