AMMAN (Reuters) - An anxious French government accelerated its diplomatic bid to save two French reporters held hostage in Iraq on Tuesday as a fresh kidnapper deadline neared for Paris to scrap a ban on Muslim headscarves in schools. With the Tuesday evening deadline approaching, the gravity of the reporters' plight was clearly highlighted when Iraqi militants said they had killed 12 Nepali hostages. President Jacques Chirac, refusing to back down over the headscarf ban, led an unprecedented diplomatic push to appeal to the militants holding Georges Malbrunot and Christian Chesnot, shown on Arab television on Monday fearing for their...