Ceasefire Struggles Over Hostage Remains
US-brokered ceasefire since October 10 aims to return hostages and remains.
Phase one involves releasing 2000 Palestinian prisoners for Israeli hostages.
Hamas handed over unidentified bodies; Israel refused samples.
Ezzedine Al-Qassam Brigades claimed to prevent enemy claims.
Israel returned 30 Palestinian bodies; earlier strikes killed over 100.
Gaza's destruction hampers remain identification.
225 Palestinian bodies received since ceasefire; 11 remain unreturned.