An airstrike authorized by the Trump administration against an al Queda outpost in Yemen has killed a former detainee from the U.S. detention center at Guantanamo Bay, Cuba who was released in 2009.

"We can confirm the death of a former Guantanamo Bay detainee, Yasir al Silmi," said Navy Captain Jeff Davis, a Pentagon spokesman.

This means that President Donald Trump has killed a foreign combatant that was released under the authority of Barack Obama.  

However, Obama is not the only one who released an enemy combatant who would eventually return to the battlefield.  George W. Bush set free an Islamic fighter in 2004 who detonated a car bomb outside an Iraqi base in Tal Gaysum, south-west of Mosul last month.

He had been captured in the Middle East by the United States in 2001, before being sent to Guantanamo Bay.  The British-born man was freed from the detention center and was given £1 million from the British taxpayers on the grounds that he was tortured.

If there were innocents sent to Guantanamo, then put into the general population for several years, you would expect some to turn against the establishment. I guess the 1 million pounds was not enough to live a lifestyle as he had done since his release nearly 12 years ago. Maybe gambling, drugs, wine, women, and song. Who knows, it just points out we all make mistakes and some people can be misguided by others. This should not be a surprise to most people.

The phrase ''take no captives, leave no witnesses'' has been followed by many who did not want to fight the  same enemy a second time after defeating him once.