Unbought and Unbossed

Postcard US-2692593 to the United Kingdom shows an inverted image of a cactus grown in Las Vegas, Nevada. I pass this location often when I go to a gym in the evening. I have been fascinated by the ever changing impressions of the cactus against the evening skies.

The postcard had a Shirley Chisholm Black Heritage Forever stamp and was sent to Brooklyn, NY along with several items for a first-day-of-issue postmark on April 1, 2014. However, it took a detour to Trenton, and Bellmawr, NJ after it already reached Brooklyn, NY on April 3, 2014. It was finally delivered at Brooklyn, NY on April 10, 2014. I am curious what happened between April 3 and April 10, 2014. 

Shipment Activity	Location	Date & Time
Delivered	BROOKLYN, NY 11256	April 10, 2014 9:54 am
Arrival at Post Office	BROOKLYN, NY 11256	April 10, 2014 9:47 am
Depart USPS Sort Facility	BROOKLYN, NY 11256	April 10, 2014
Processed through USPS Sort Facility	BROOKLYN, NY 11256	April 10, 2014 4:33 am
Depart USPS Sort Facility	BELLMAWR, NJ 08031	April 5, 2014
Processed through USPS Sort Facility	BELLMAWR, NJ 08031	April 5, 2014 5:38 pm
Depart USPS Sort Facility	TRENTON, NJ 08650	April 5, 2014
Processed through USPS Sort Facility	TRENTON, NJ 08650	April 5, 2014 3:41 am
Arrive USPS Sort Facility	BROOKLYN, NY 11256	April 3, 2014 7:14 am
Depart USPS Sort Facility	FLUSHING, NY 11351	April 3, 2014 6:22 am
Depart USPS Sort Facility	FLUSHING, NY 11351	April 3, 2014
Processed through USPS Sort Facility	FLUSHING, NY 11351	April 3, 2014 2:45 am
Electronic Shipping Info Received		April 2, 2014
Processed at USPS Origin Sort Facility	LAS VEGAS, NV 89120	April 2, 2014 12:15 am
Dispatched to Sort Facility	LAS VEGAS, NV 89199	April 1, 2014 6:15 pm
Acceptance	LAS VEGAS, NV 89199	April 1, 2014 5:32 pm