Uniting Libya's rebel forces

There is a new drive to try and unite all the rebel forces in Libya as one 'National Army'.

But despite this, and four months of NATO bombings targeting key government installations, progress for the opposition has been slow.

This has raised questions about whether the patchwork of rebel forces can achieve its ultimate goal of removing Muammar Gaddafi.

Former government officers are now the trainers responsible for readying rebel fighters for battle. And as the opposition heads towards Tripoli, the pressure on them is increasing.

Al Jazeera's Hoda Abdel-Hamid reports from Misurata.