  If $X$ is a closed subspace of a Banach space $L$ which embeds into a Banach
lattice not containing $\ell_\infty^n$'s uniformly and $L/X$ contains
$\ell_\infty^n$'s uniformly, then $X$ cannot have local unconditional structure
in the sense of Gordon-Lewis (GL-{\sl l.u.st.}).
