>> In his first speech since returning to Nigeria after more than 100 days in Britain for medical leave, President Muhammadu Buhari getting straight to business on Monday. Telling separatists who are calling for the break up of Nigeria, that they've crossed the line.>> I was distressed to notice that some of the comments, especially in the social media have crossed our national red lines by daring to question our collective existence as a nation.
>> Ethnic tensions have surfaced in the last few months amidst calls for a separate southeastern state known as Biafra. Some in the rest of Niger Delta oil hub seeking independence. And Boko Haram militants trying to create their own Islamic State. The tension over Biafra echoes the buildup to a civil war over the secession of the area in 1967.
Over 1 million people were killed in the three year conflict, which ended in Nigeria's victory. While Buhari was away, his deputy try to ease hostility between regional leaders. But the President's long absence left a notable hole. Many questioning the 74-year-old's ability to run the country. It was his second lengthy overseas break for medical treatment this year.
On Monday, Buhari vowed to reinforce the fight against Boko Haram in the northeast. His return posing tough challenges for the President, as well as stepping up security against increasing attacks by the militant group. He also has to convince Nigerians to come together.