  Given an ideal $I$ in a Noetherian ring, one can ask the containment
question: for which $m$ and $r$ is the symbolic power $I^{(m)}$ contained in
the ordinary power $I^r$? C. Bocci and B. Harbourne study the containment
question in a geometric setting, where the ideal $I$ is in a polynomial ring
over a field. Like them, we will consider special geometric constructs. In
particular, we obtain a complete solution in two extreme cases of ideals of
points on a pair of lines in $\mathbb{P}^2$; in one case, the number of points
on each line is the same, while in the other all the points but one are on one
of the lines.
