What have you learned since the Sept. 11 attacks five years ago? The mass murder of 2,996 innocent people on American soil forced open my eyes to the Islamic holy war against the West, freedom and modernity. The battle has raged not for years or decades, but for centuries -- well before the Crusades began.

The indelible sight of workers plunging from the Twin Towers -- head first, feet first, solo, hand-in-hand -- roused me from slumber. The photos of children who were incinerated on United Airlines Flight 175 and American Airlines Flight 77 compelled me to start paying attention to the beliefs, goals, language and lies of those who would gladly kill my children the same way. The United Airlines Flight 93 hijackers' final exclamation as they drove the plane into the ground is a Muslim warrior leitmotif I will never again ignore: "Allahu Akbar! Allahu Akbar! Allahu Akbar!"

So, how much do you know? Take a post-9/11 pop quiz. It's never too late to start pulling your head from the sand:

Jihadis. These are our enemies -- from Mohammed Atta and company to the Butchers of Beslan, to the throat-slitters in Karachi and Baghdad and Mindanao, to the bombers of Bali, Madrid and London, to their funders and imams and enablers worldwide. They are not "freedom fighters" or "militants" or "rebels" or "evildoers" of unknown geographic and religious affiliation.

Apologists claim "jihad" means a peaceful Muslim striving for spiritual perfection. But the late Ayatollah Khomeini rebuked Religion of Peace propagandists back in 1942: "Those who know nothing of Islam pretend that Islam counsels against war. Those (who say this) are witless."

Egyptian-born Nonie Darwish, an ex-Muslim whose father founded the terrorist Fedayeen in Gaza and killed 400 Israelis, had her own recent rejoinder for the p.c. whitewashers who have redefined jihad as a kinder, gentler struggle: "In the Arab world we were only taught one meaning for Jihad, and that is: A religious holy war against infidels and armed struggle against anyone who is not a Moslem."

Infidels/Kafirs . Anyone who is not a Muslim. Continued...