  Recently introduced supertoroidal light pulses [Nat. Commun. 15, 5891 (2021)]
are a family of space-time nonseparable freespace electromagnetic excitations
with unique topological properties including skyrmionic field configurations,
fractal-like patterns of singularities, and extended areas of energy backflow.
Here we report nondiffracting supertoroidal pulses (ND-STPs),
propagation-robust skyrmionic and vortex-ring field that endure the singular
configurations over arbitrary propagation distances. Intriguingly, the field
structure in of ND-STPs has a strong similarity with a von K\'arm\'an vortex
street, a pattern of swirling vortices observed in fluid and gas dynamics that
is responsible for the "singing" of suspended telephone lines in wind. We argue
that ND-STPs are of interest as directed energy channels for telecom
applications.
