Relax soldier, Paris has fallen. You deserve a rest!
The Germans were well prepared for the initial US landings at Omaha beach. They were able to delay the advance die to multiple well placed shots from an 88 and an Anti-tank gun. They were able to destroy multiple US landing craft in deep and shallow water, causing many US troop to wade to shore under fire.
Once the US troops made landfall they were met with well placed machinegun and artillery fire. This prevented the US troops from quickly taking a command bunker and significantly delayed their ability to gain control of a vital crossroad objective.