Mali has announced that US nationals visiting the West African country will be required to post a bond of up to $10,000 (£7,500) for business and tourist visas, in response to a similar requirement the Trump administration has imposed on its citizens. The US embassy in Mali said on Friday the fee had been introduced to reinforce Washington's "commitment to protecting America's borders and safeguarding US national security". Mali's foreign ministry said on Sunday the bond had been imposed