RB-57F 63-13502 SECOND SLICE / RIVET SLICE was assigned to the 7407.SS based at Rhein-Main. 
Peripheral flights. PHOTINT.<br />
Seen here in the USA.
<br /><br />
<small>The Big Safari program name mentioned corresponds to the period when 
the aircraft was photographed. The aircraft modifications and the Big Safari 
program in which this particular aircraft was involved were not necessarily 
the same before or after.</small>