Tillerson said the USA will assist Nigeria with latest security equipment and intelligence sharing in its efforts toward the safe return of the abducted schoolgirls.
"Almost 20 years later, we meet here to honour those who we lost and those who were injured", he said.
"When it's cold, that's when I feel pain", he said. Tillerson, 65, cancelled some events in Kenya on Saturday, saying he was feeling unwell.
Tillerson's arrived at the State House, Abuja around 4.07 p.m local time for the meeting.
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Cousins , 29, did not sign a long-term deal with the Redskins and twice played under the franchise-player tag in Washington . CHIEFS: Kansas City will add wide receiver Sammy Watkins and middle linebacker Anthony Hitchens, filling two glaring needs.
President Buhari welcomed the USA top diplomat in company with the Minister of Foreign Affairs, Mr Geoffrey Onyeama, and his Chief of Staff, Abba Kyari.
The talks were a follow-up to the bilateral meeting held on Friday with President Uhuru Kenyatta.
The Secretary emphasised strong United States support for democratic institutions, including the judiciary, civil society, and the media, and expressed concern about restrictions to political space.
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U.S. Institute of Peace senior adviser Johnnie Carson said in an interview with VOA a free and independent media instills public confidence.
Tillerson visited N'Djamena, Chad's capital, on what was later announced to be the last day of his African visit.
Tillerson had been scheduled to lay a wreath at the site of the 1998 bombing of the US embassy in Nairobi, in which more than 200 people were killed, and attend an event to highlight USA health assistance in Africa.
The visiting Secretary of State commended President Buhari on his strides in the anti-corruption war, to which the Nigerian leader responded that monies recovered are being invested on development of infrastructure.
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Cech registered his 200th Premier League clean sheet, the first goalkeeper to achieve this feat in the competition's history. He took 143 games for Leeds and Manchester United to reach that total, with Ozil beating him by two matches.