Were war crimes committed during the lop-sided war between Hamas and Israel which began a year ago? A recent UN-sponsored report pointed to serious violations of international law on both sides, but how credible were the findings? Stephen Sackur speaks to William Schabas, who chaired the commission of inquiry into the Gaza War until he quit under heavy fire from Israel. What does the Schabas saga say about the effort to apply international justice in the Middle East?