Except for Yom Ha'atzmaut
The Chazon Ish was מכבד (gave respect) one of the Zionist Rabonim. He was friendly and had very good relations with this Rav.
The Chazon Ish explained the reason
for this relationship.
He said "This Rav thinks he is deceiving me
when discussing certain issues or שאלות.
In the meantime, it is me who is deceiving him.
Because of my influence, he refrains from doing
many things that he would otherwise have done
if not I had befriended him".
The Chazon Ish gave an example of one
of the discussions they had.
The Rav asked the Chazon Ish if there is a way to be מתיר (allow) for soldiers to get married during Sefira.
Soldiers could only get married while they are on leave. By not being able to get married during Sefira they might have
to delay their wedding for many months.
The Chazon Ish knew exactly what the Rav had in mind. It was to get a Heter to get married on Yom Ha'atzmaut, being this was the day many soldiers are on leave.
The Chazon Ish answered "that he agrees
with him, if being in the army is the cause for
delaying their marriage for an extended period
of time they should be allowed to get married
during the Sefirah.
He would be willing to be מתיר soldiers
on leave to get married during all days of Sefirah
except for one day, "Yom Ha'atzmaut".
" במחיצתם "- הרב שלמה לורנץ ז"ל