Thousands of Egyptians perform Friday prayers at Tahrir Square, the focal point of the Egyptian uprising, in Cairo, Friday, July 8. (Amr Nabil/AP)

Friday’s rally, which protesters are calling the “March of the Million,” is expected to be the largest demonstration since Mubarak fell on Feb. 11, al-Jazeera reports.

Protesters have the backing of most political groups and parties, including the Muslim Brotherhood, Egypt’s most organized political group. Demonstrations took place in the cities of Cairo, Suez, and Alexandria.

Watch a video that shows the immense numbers said to be gathered in Tahrir Square Friday:

Tweets from Tahrir Square showed the protesters’ frustation:

chants heard so far in #tahrir: “execution awaits you mubarak” “Interior Ministry still thugs” “people want country cleansed” @Nadiagloryless than a minute ago via web Favorite Retweet ReplyAyman Mohyeldin

But also the newfound energy:

Cab driver wouldn’t take his charge after he knew I was going to #Tahrir! Amazing spirit! #Egypt #Jan25 #July8 #Jul8less than a minute ago via Twitter for iPhone Favorite Retweet ReplyAliaashabrawy

And some tweets showed the posturing by political parties:

@shadihamid I am standing with a group of MB followers. They are convinced that without MB there would be no big turnout #tahrir #jul8less than a minute ago via Twitter for BlackBerry® Favorite Retweet ReplyDima Khatib أنا ديمة