Video and photographic evidence, along with eyewitness accounts, are providing some clues about Tuesday's massive explosion at Gaza's Al Ahli Arab Hospital, which Palestinian officials say killed hundreds.
Hamas blames an Israeli airstrike for the blast, a charge the Israeli Defense Forces have vigorously denied. Israel says that a Palestinian rocket, launched by a Palestinian militant group called Islamic Jihad, exploded in mid-air and fell on the hospital grounds. The U.S. believes Israel is not to blame, based on analysis of "overhead imagery, intercepts and open source information," a National Security Council spokesperson said Wednesday.
