Similar to its first quarter, General Dynamics [GD] yesterday posted a slender increase in its second quarter earnings, driven by lower interest expenses and a lower share count as its sales remained level. Net income inched up a percent to $640 million, $1.81 earnings per share (EPS), from $634 million ($1.77 EPS) a year ago, cruising well past consensus estimates of $1.62 EPS. Per share earnings rose a little more than 2 percent as GD’s stock repurchase program lowered the…