Twenty years ago today, roadblocks were already in place throughout Rwanda, put there the day before by the army and the Interahamwe militia groups. The army and the militia were Hutu. The people they were looking for were Tutsi, and they were looking for them with guns and machetes, going house to house to find anyone who hadn't yet fled or been caught.
But this wasn't the case throughout the whole of the nation. There was a swathe of the country in the north still held by Paul Kagame's Rwandan Patriotic Front - the rebel Tutsi army that had been holding to a ceasefire before the death of the Hutu president sparked off the killings. There were no massacres in RPF territory, nor were the bulk of the RPF in any immediate danger - save for the 600 men trapped in the capital, Kigali. They'd been stationed there as part of the ongoing peace process. But now they were surrounded, their situation growing more desperate by the hour.
For the only Tutsi army able to fight back, there was no choice: they had to respond. Kagame launched an offensive to rescue his troops and end the killings. But there was little hope that they could end the slaughter quickly. They hadn't been able to take the country when they were fighting before. Millions of Tutsis were still defenceless, no matter what the RPF did.
There wasn't much hope of rescue by the UN, either. The general in charge of the UN mission in Rwanda, Romeo Dallaire, sent a report to the UN detailing how the genocide was happening, and how it was being orchestrated by the civil government against its own people. But Dallaire was able to do little to stop the killing. He had only 2,500 troops at his command, equipped and trained to help a nation struggle towards peace - not to stop that nation from turning on itself.
The genocide was not unopposed - but it made little difference. The slaughter went on.