In a sweeping rebuke of the National Rifle association, the nation's most prominent guns rights group, a Manhattan jury ruled Friday that the leaders had engaged in years long patterns of financial misconduct and corruption. The jury, after a week of deliberations, found that the group's former leader, Wayne LaPierre, had used NRA funds to pay for personal expenses, including vacations, luxury flights for his relatives and yacht rides. And on the two other top executives, they had failed in their duties to the nonprofit organization