In the army now

One Sunday morning the pastor noticed little Johnny was standing staring up at the large plaque that hung in the foyer of the church. The young man of seven had been staring at the plaque for some time, so the pastor walked up and stood beside him and gazing up at the plaque he said quietly, "Good morning son." "Good morning pastor" replied the young man not taking his eyes off the plaque. "Sir, what is this?" Johnny asked.
"Well son, these are all the people who have died in the service", replied the pastor. Soberly, they stood together staring up at the large plaque Little Johnny's voice barely broke the silence when he asked  quietly, "Which one sir, the 8:30 or the 10:30?"

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On some air bases the Air Force is on one side of the field and civilian aircraft use the other side of the field, with the control tower in the middle. One day the tower received a call from an aircraft asking, "What time is it?"
The tower responded, "Who is calling?"
The aircraft replied, "What difference does it make?"
The tower replied "It makes a lot of difference. If it is an American Airlines Flight, it is 3 o'clock. If it is an Air Force, it is 1500 hours. If it is a Navy aircraft, it is 6 bells. If it is an Army aircraft, the big hand is on the 12 and the little hand is on the 3.
 If it is a Marine Corps aircraft, it's Thursday afternoon".