How could the reopening of Gaza's Rafah crossing change the humanitarian situation?

Ambulances from the Egyptian side of the Rafah border crossing have been seen heading into Gaza. The reopening of the enclave’s southern crossing marks a major step in the US-backed peace plans’ second phase. But for the moment, the Rafah gate is only being used on a trial basis – and key details are still unclear. Many Palestinians have been waiting for this moment, as they head to Egypt for medical treatment. Analysis by Dr. James Smith, deputy director of UCL’s humanitarian policy and practice program.