Millions enjoy Thanksgiving festivities across US; Troops dig into Thanksgiving dinner in Afghanistan; Holiday shopping kicks off on Thanksgiving Day; ‘Quiet’ weather expected for holiday weekend; Obamacare insurers make push for younger users; American oil boom brings gas prices down; Food pantries face shortages due to crippling cuts; ‘Thanksgiving comet’ burns out in trip around sun; Lindsay Vonn returns to slopes days after injury; American Foxhound wins Best in Show.Nov. 29, 2013