Mutated Al Qaeda virus ....

more deadly than the identifiable one.

  Moeed Abdul Salam didn't descend into radical Islam for lack of other options. He grew up in a well-off Texas household, attended a pricey boarding school and graduated from one of the state's most respected universities.

But the most unlikely thing about his recruitment was his family: Two generations had spent years promoting interfaith harmony and combatting Muslim stereotypes in their hometown and even on national television.

Salam rejected his relatives' moderate faith and comfortable life, choosing instead a path that led him to work for al-Qaida. His odyssey ended late last year in a middle-of-the-night explosion in Pakistan. The 37-year-old father of four was dead after paramilitary troops stormed his apartment.

His Nov. 19 death went largely unnoticed in the U.S. and rated only limited attention in Pakistan. But the circumstances threatened to overshadow the work of an American family devoted to religious understanding. And his mysterious evolution presented a reminder of the attraction Pakistan still holds for Islamic militants, especially well-educated Westerners whose Internet and language skills make them useful converts for jihad.....

.....The family, originally from Pakistan, immigrated to the U.S. decades ago. Salam's father was a pilot for a Saudi airline, and the family eventually settled in the Dallas suburb of Plano. Their cream-colored brick home, assessed at nearly $400,000, stands on a corner lot in a quiet, upper-class neighborhood.

The family obtained American citizenship in 1986. Salam attended Suffield Academy in Connecticut, a private high school where tuition and board currently run $46,500. He graduated in 1992......