On pg. 47 of Hathcer's Algebraic Topology, the author discusses the fundamental group of $\mathbf R^n-(A\cup B)$, where $A$ and $B$ are circles in $\mathbf R^3$ which are linked.
The author writes that $\mathbf R^3-A\cup B$ deformation retracts to the wedge sum of a torus and a $2$-sphere.
I was unable to see how this is so. Can somebody please help me visualize a deformation retract.